Home / 12,489.60-17,237.36-7,184.28

Finding the Fourth Proportional to 12,489.60, 17,237.36 and 7,184.28

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Solution

The fourth proportional to 12,489.60, 17,237.36 and 7,184.28 is: 9,915.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.60 : 17,237.36 = 7,184.28 : x
  2. Step 2: Convert to fraction form
    12,489.60/17,237.36 = 7,184.28/x
  3. Step 3: Cross multiply
    12,489.60x = 17,237.36 × 7,184.28
  4. Step 4: Simplify right side
    12,489.60x = 123,838,020.70
  5. Step 5: Solve for x
    x = 123,838,020.70/12,489.60
  6. Step 6: Final answer
    x = 9,915.29

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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.