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Finding the Fourth Proportional to 42,664.88, 63,998.80 and 11,500.88

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Solution

The fourth proportional to 42,664.88, 63,998.80 and 11,500.88 is: 17,251.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,664.88 : 63,998.80 = 11,500.88 : x
  2. Step 2: Convert to fraction form
    42,664.88/63,998.80 = 11,500.88/x
  3. Step 3: Cross multiply
    42,664.88x = 63,998.80 × 11,500.88
  4. Step 4: Simplify right side
    42,664.88x = 736,042,518.94
  5. Step 5: Solve for x
    x = 736,042,518.94/42,664.88
  6. Step 6: Final answer
    x = 17,251.72

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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.