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Finding the Fourth Proportional to 42,459.35, 63,689.12 and 14,379.68

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Solution

The fourth proportional to 42,459.35, 63,689.12 and 14,379.68 is: 21,569.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,459.35 : 63,689.12 = 14,379.68 : x
  2. Step 2: Convert to fraction form
    42,459.35/63,689.12 = 14,379.68/x
  3. Step 3: Cross multiply
    42,459.35x = 63,689.12 × 14,379.68
  4. Step 4: Simplify right side
    42,459.35x = 915,828,774.74
  5. Step 5: Solve for x
    x = 915,828,774.74/42,459.35
  6. Step 6: Final answer
    x = 21,569.55

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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.