Home / 20,718.46-28,591.61-11,287.02

Finding the Fourth Proportional to 20,718.46, 28,591.61 and 11,287.02

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Solution

The fourth proportional to 20,718.46, 28,591.61 and 11,287.02 is: 15,576.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.46 : 28,591.61 = 11,287.02 : x
  2. Step 2: Convert to fraction form
    20,718.46/28,591.61 = 11,287.02/x
  3. Step 3: Cross multiply
    20,718.46x = 28,591.61 × 11,287.02
  4. Step 4: Simplify right side
    20,718.46x = 322,714,073.90
  5. Step 5: Solve for x
    x = 322,714,073.90/20,718.46
  6. Step 6: Final answer
    x = 15,576.16

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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.