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Finding the Fourth Proportional to 12,390.75, 17,099.24 and 6,801.63

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Solution

The fourth proportional to 12,390.75, 17,099.24 and 6,801.63 is: 9,386.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.75 : 17,099.24 = 6,801.63 : x
  2. Step 2: Convert to fraction form
    12,390.75/17,099.24 = 6,801.63/x
  3. Step 3: Cross multiply
    12,390.75x = 17,099.24 × 6,801.63
  4. Step 4: Simplify right side
    12,390.75x = 116,302,669.75
  5. Step 5: Solve for x
    x = 116,302,669.75/12,390.75
  6. Step 6: Final answer
    x = 9,386.25

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Half scale
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Double scale
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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.