Home / 21,082.20-31,638.72-15,550.47

Finding the Fourth Proportional to 21,082.20, 31,638.72 and 15,550.47

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Solution

The fourth proportional to 21,082.20, 31,638.72 and 15,550.47 is: 23,337.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,082.20 : 31,638.72 = 15,550.47 : x
  2. Step 2: Convert to fraction form
    21,082.20/31,638.72 = 15,550.47/x
  3. Step 3: Cross multiply
    21,082.20x = 31,638.72 × 15,550.47
  4. Step 4: Simplify right side
    21,082.20x = 491,996,966.20
  5. Step 5: Solve for x
    x = 491,996,966.20/21,082.20
  6. Step 6: Final answer
    x = 23,337.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.