Home / 21,988.80-32,921.10-17,115.30

Finding the Fourth Proportional to 21,988.80, 32,921.10 and 17,115.30

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Solution

The fourth proportional to 21,988.80, 32,921.10 and 17,115.30 is: 25,624.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.80 : 32,921.10 = 17,115.30 : x
  2. Step 2: Convert to fraction form
    21,988.80/32,921.10 = 17,115.30/x
  3. Step 3: Cross multiply
    21,988.80x = 32,921.10 × 17,115.30
  4. Step 4: Simplify right side
    21,988.80x = 563,454,502.83
  5. Step 5: Solve for x
    x = 563,454,502.83/21,988.80
  6. Step 6: Final answer
    x = 25,624.61

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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.