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Finding the Fourth Proportional to 12,390.66, 17,098.65 and 6,725.29

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Solution

The fourth proportional to 12,390.66, 17,098.65 and 6,725.29 is: 9,280.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.66 : 17,098.65 = 6,725.29 : x
  2. Step 2: Convert to fraction form
    12,390.66/17,098.65 = 6,725.29/x
  3. Step 3: Cross multiply
    12,390.66x = 17,098.65 × 6,725.29
  4. Step 4: Simplify right side
    12,390.66x = 114,993,311.47
  5. Step 5: Solve for x
    x = 114,993,311.47/12,390.66
  6. Step 6: Final answer
    x = 9,280.65

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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.