Home / 20,516.16-28,312.24-11,084.72

Finding the Fourth Proportional to 20,516.16, 28,312.24 and 11,084.72

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Solution

The fourth proportional to 20,516.16, 28,312.24 and 11,084.72 is: 15,296.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.16 : 28,312.24 = 11,084.72 : x
  2. Step 2: Convert to fraction form
    20,516.16/28,312.24 = 11,084.72/x
  3. Step 3: Cross multiply
    20,516.16x = 28,312.24 × 11,084.72
  4. Step 4: Simplify right side
    20,516.16x = 313,833,252.97
  5. Step 5: Solve for x
    x = 313,833,252.97/20,516.16
  6. Step 6: Final answer
    x = 15,296.88

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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.