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Finding the Fourth Proportional to 21,855.60, 32,780.88 and 6,061.80

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Solution

The fourth proportional to 21,855.60, 32,780.88 and 6,061.80 is: 9,092.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,855.60 : 32,780.88 = 6,061.80 : x
  2. Step 2: Convert to fraction form
    21,855.60/32,780.88 = 6,061.80/x
  3. Step 3: Cross multiply
    21,855.60x = 32,780.88 × 6,061.80
  4. Step 4: Simplify right side
    21,855.60x = 198,711,138.38
  5. Step 5: Solve for x
    x = 198,711,138.38/21,855.60
  6. Step 6: Final answer
    x = 9,092.00

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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.