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Finding the Fourth Proportional to 21,803.80, 32,706.02 and 5,387.80

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Solution

The fourth proportional to 21,803.80, 32,706.02 and 5,387.80 is: 8,081.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,803.80 : 32,706.02 = 5,387.80 : x
  2. Step 2: Convert to fraction form
    21,803.80/32,706.02 = 5,387.80/x
  3. Step 3: Cross multiply
    21,803.80x = 32,706.02 × 5,387.80
  4. Step 4: Simplify right side
    21,803.80x = 176,213,494.56
  5. Step 5: Solve for x
    x = 176,213,494.56/21,803.80
  6. Step 6: Final answer
    x = 8,081.78

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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.