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Finding the Fourth Proportional to 21,836.52, 32,756.90 and 8,685.99

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Solution

The fourth proportional to 21,836.52, 32,756.90 and 8,685.99 is: 13,029.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,836.52 : 32,756.90 = 8,685.99 : x
  2. Step 2: Convert to fraction form
    21,836.52/32,756.90 = 8,685.99/x
  3. Step 3: Cross multiply
    21,836.52x = 32,756.90 × 8,685.99
  4. Step 4: Simplify right side
    21,836.52x = 284,526,062.40
  5. Step 5: Solve for x
    x = 284,526,062.40/21,836.52
  6. Step 6: Final answer
    x = 13,029.83

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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.