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Finding the Fourth Proportional to 42,644.87, 63,935.72 and 20,437.10

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Solution

The fourth proportional to 42,644.87, 63,935.72 and 20,437.10 is: 30,640.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,644.87 : 63,935.72 = 20,437.10 : x
  2. Step 2: Convert to fraction form
    42,644.87/63,935.72 = 20,437.10/x
  3. Step 3: Cross multiply
    42,644.87x = 63,935.72 × 20,437.10
  4. Step 4: Simplify right side
    42,644.87x = 1,306,660,837.50
  5. Step 5: Solve for x
    x = 1,306,660,837.50/42,644.87
  6. Step 6: Final answer
    x = 30,640.51

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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.