Home / 15,915.92-21,966.60-13,259.12

Finding the Fourth Proportional to 15,915.92, 21,966.60 and 13,259.12

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Solution

The fourth proportional to 15,915.92, 21,966.60 and 13,259.12 is: 18,299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,915.92 : 21,966.60 = 13,259.12 : x
  2. Step 2: Convert to fraction form
    15,915.92/21,966.60 = 13,259.12/x
  3. Step 3: Cross multiply
    15,915.92x = 21,966.60 × 13,259.12
  4. Step 4: Simplify right side
    15,915.92x = 291,257,785.39
  5. Step 5: Solve for x
    x = 291,257,785.39/15,915.92
  6. Step 6: Final answer
    x = 18,299.78

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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.