Home / 28,115.52-38,799.18-15,540

Finding the Fourth Proportional to 28,115.52, 38,799.18 and 15,540

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Solution

The fourth proportional to 28,115.52, 38,799.18 and 15,540 is: 21,445.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.52 : 38,799.18 = 15,540 : x
  2. Step 2: Convert to fraction form
    28,115.52/38,799.18 = 15,540/x
  3. Step 3: Cross multiply
    28,115.52x = 38,799.18 × 15,540
  4. Step 4: Simplify right side
    28,115.52x = 602,939,257.20
  5. Step 5: Solve for x
    x = 602,939,257.20/28,115.52
  6. Step 6: Final answer
    x = 21,445.07

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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.