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Finding the Fourth Proportional to 20,642.79, 30,964.18 and 5,060.42

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Solution

The fourth proportional to 20,642.79, 30,964.18 and 5,060.42 is: 7,590.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.79 : 30,964.18 = 5,060.42 : x
  2. Step 2: Convert to fraction form
    20,642.79/30,964.18 = 5,060.42/x
  3. Step 3: Cross multiply
    20,642.79x = 30,964.18 × 5,060.42
  4. Step 4: Simplify right side
    20,642.79x = 156,691,755.76
  5. Step 5: Solve for x
    x = 156,691,755.76/20,642.79
  6. Step 6: Final answer
    x = 7,590.63

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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.