Home / 20,516.17-28,335.68-13,790.12

Finding the Fourth Proportional to 20,516.17, 28,335.68 and 13,790.12

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Solution

The fourth proportional to 20,516.17, 28,335.68 and 13,790.12 is: 19,046.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.17 : 28,335.68 = 13,790.12 : x
  2. Step 2: Convert to fraction form
    20,516.17/28,335.68 = 13,790.12/x
  3. Step 3: Cross multiply
    20,516.17x = 28,335.68 × 13,790.12
  4. Step 4: Simplify right side
    20,516.17x = 390,752,498.88
  5. Step 5: Solve for x
    x = 390,752,498.88/20,516.17
  6. Step 6: Final answer
    x = 19,046.07

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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.