Home / 20,531.68-28,333.20-11,579.02

Finding the Fourth Proportional to 20,531.68, 28,333.20 and 11,579.02

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Solution

The fourth proportional to 20,531.68, 28,333.20 and 11,579.02 is: 15,978.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.68 : 28,333.20 = 11,579.02 : x
  2. Step 2: Convert to fraction form
    20,531.68/28,333.20 = 11,579.02/x
  3. Step 3: Cross multiply
    20,531.68x = 28,333.20 × 11,579.02
  4. Step 4: Simplify right side
    20,531.68x = 328,070,689.46
  5. Step 5: Solve for x
    x = 328,070,689.46/20,531.68
  6. Step 6: Final answer
    x = 15,978.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.