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Finding the Fourth Proportional to 42,379.61, 63,491.90 and 19,848.93

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Solution

The fourth proportional to 42,379.61, 63,491.90 and 19,848.93 is: 29,737.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,379.61 : 63,491.90 = 19,848.93 : x
  2. Step 2: Convert to fraction form
    42,379.61/63,491.90 = 19,848.93/x
  3. Step 3: Cross multiply
    42,379.61x = 63,491.90 × 19,848.93
  4. Step 4: Simplify right side
    42,379.61x = 1,260,246,179.42
  5. Step 5: Solve for x
    x = 1,260,246,179.42/42,379.61
  6. Step 6: Final answer
    x = 29,737.09

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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.