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Finding the Fourth Proportional to 12,390.68, 17,098.46 and 6,801.24

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Solution

The fourth proportional to 12,390.68, 17,098.46 and 6,801.24 is: 9,385.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.68 : 17,098.46 = 6,801.24 : x
  2. Step 2: Convert to fraction form
    12,390.68/17,098.46 = 6,801.24/x
  3. Step 3: Cross multiply
    12,390.68x = 17,098.46 × 6,801.24
  4. Step 4: Simplify right side
    12,390.68x = 116,290,730.09
  5. Step 5: Solve for x
    x = 116,290,730.09/12,390.68
  6. Step 6: Final answer
    x = 9,385.34

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Find fourth proportional to 6,195.34, 8,549.23 and 3,400.62
Half scale
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Double scale
Find fourth proportional to 12,391.68, 17,099.84 and 6,802.24
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.