Home / 20,717.76-28,591.20-11,287.20

Finding the Fourth Proportional to 20,717.76, 28,591.20 and 11,287.20

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Solution

The fourth proportional to 20,717.76, 28,591.20 and 11,287.20 is: 15,576.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.76 : 28,591.20 = 11,287.20 : x
  2. Step 2: Convert to fraction form
    20,717.76/28,591.20 = 11,287.20/x
  3. Step 3: Cross multiply
    20,717.76x = 28,591.20 × 11,287.20
  4. Step 4: Simplify right side
    20,717.76x = 322,714,592.64
  5. Step 5: Solve for x
    x = 322,714,592.64/20,717.76
  6. Step 6: Final answer
    x = 15,576.71

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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.