Home / 20,819.52-28,730.36-11,387.88

Finding the Fourth Proportional to 20,819.52, 28,730.36 and 11,387.88

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Solution

The fourth proportional to 20,819.52, 28,730.36 and 11,387.88 is: 15,714.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.52 : 28,730.36 = 11,387.88 : x
  2. Step 2: Convert to fraction form
    20,819.52/28,730.36 = 11,387.88/x
  3. Step 3: Cross multiply
    20,819.52x = 28,730.36 × 11,387.88
  4. Step 4: Simplify right side
    20,819.52x = 327,177,892.04
  5. Step 5: Solve for x
    x = 327,177,892.04/20,819.52
  6. Step 6: Final answer
    x = 15,714.96

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1.5x scale

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.