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Finding the Fourth Proportional to 42,572.40, 63,861.48 and 12,992.88

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Solution

The fourth proportional to 42,572.40, 63,861.48 and 12,992.88 is: 19,490.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,572.40 : 63,861.48 = 12,992.88 : x
  2. Step 2: Convert to fraction form
    42,572.40/63,861.48 = 12,992.88/x
  3. Step 3: Cross multiply
    42,572.40x = 63,861.48 × 12,992.88
  4. Step 4: Simplify right side
    42,572.40x = 829,744,546.26
  5. Step 5: Solve for x
    x = 829,744,546.26/42,572.40
  6. Step 6: Final answer
    x = 19,490.20

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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.