Home / 28,115.38-38,799.23-15,540.13

Finding the Fourth Proportional to 28,115.38, 38,799.23 and 15,540.13

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Solution

The fourth proportional to 28,115.38, 38,799.23 and 15,540.13 is: 21,445.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.38 : 38,799.23 = 15,540.13 : x
  2. Step 2: Convert to fraction form
    28,115.38/38,799.23 = 15,540.13/x
  3. Step 3: Cross multiply
    28,115.38x = 38,799.23 × 15,540.13
  4. Step 4: Simplify right side
    28,115.38x = 602,945,078.10
  5. Step 5: Solve for x
    x = 602,945,078.10/28,115.38
  6. Step 6: Final answer
    x = 21,445.38

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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.