Home / 28,287.13-39,037.45-15,711.88

Finding the Fourth Proportional to 28,287.13, 39,037.45 and 15,711.88

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Solution

The fourth proportional to 28,287.13, 39,037.45 and 15,711.88 is: 21,683.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,287.13 : 39,037.45 = 15,711.88 : x
  2. Step 2: Convert to fraction form
    28,287.13/39,037.45 = 15,711.88/x
  3. Step 3: Cross multiply
    28,287.13x = 39,037.45 × 15,711.88
  4. Step 4: Simplify right side
    28,287.13x = 613,351,534.72
  5. Step 5: Solve for x
    x = 613,351,534.72/28,287.13
  6. Step 6: Final answer
    x = 21,683.06

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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.