Home / 20,887,546.92-28,815,321.42-13,547,229.72

Finding the Fourth Proportional to 20,887,546.92, 28,815,321.42 and 13,547,229.72

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Solution

The fourth proportional to 20,887,546.92, 28,815,321.42 and 13,547,229.72 is: 18,689,019.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887,546.92 : 28,815,321.42 = 13,547,229.72 : x
  2. Step 2: Convert to fraction form
    20,887,546.92/28,815,321.42 = 13,547,229.72/x
  3. Step 3: Cross multiply
    20,887,546.92x = 28,815,321.42 × 13,547,229.72
  4. Step 4: Simplify right side
    20,887,546.92x = 390,367,778,732,376.62
  5. Step 5: Solve for x
    x = 390,367,778,732,376.62/20,887,546.92
  6. Step 6: Final answer
    x = 18,689,019.84

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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.