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Finding the Fourth Proportional to 21,385.52, 32,060.98 and 8,914.94

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Solution

The fourth proportional to 21,385.52, 32,060.98 and 8,914.94 is: 13,365.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.52 : 32,060.98 = 8,914.94 : x
  2. Step 2: Convert to fraction form
    21,385.52/32,060.98 = 8,914.94/x
  3. Step 3: Cross multiply
    21,385.52x = 32,060.98 × 8,914.94
  4. Step 4: Simplify right side
    21,385.52x = 285,821,713.04
  5. Step 5: Solve for x
    x = 285,821,713.04/21,385.52
  6. Step 6: Final answer
    x = 13,365.20

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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.