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Finding the Fourth Proportional to 42,479.56, 63,719.42 and 11,314.76

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Solution

The fourth proportional to 42,479.56, 63,719.42 and 11,314.76 is: 16,972.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,479.56 : 63,719.42 = 11,314.76 : x
  2. Step 2: Convert to fraction form
    42,479.56/63,719.42 = 11,314.76/x
  3. Step 3: Cross multiply
    42,479.56x = 63,719.42 × 11,314.76
  4. Step 4: Simplify right side
    42,479.56x = 720,969,944.64
  5. Step 5: Solve for x
    x = 720,969,944.64/42,479.56
  6. Step 6: Final answer
    x = 16,972.16

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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.