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Finding the Fourth Proportional to 21,837.39, 32,756.08 and 8,689.87

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Solution

The fourth proportional to 21,837.39, 32,756.08 and 8,689.87 is: 13,034.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,837.39 : 32,756.08 = 8,689.87 : x
  2. Step 2: Convert to fraction form
    21,837.39/32,756.08 = 8,689.87/x
  3. Step 3: Cross multiply
    21,837.39x = 32,756.08 × 8,689.87
  4. Step 4: Simplify right side
    21,837.39x = 284,646,076.91
  5. Step 5: Solve for x
    x = 284,646,076.91/21,837.39
  6. Step 6: Final answer
    x = 13,034.80

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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.