Home / 20,940.30-28,897.86-11,508.87

Finding the Fourth Proportional to 20,940.30, 28,897.86 and 11,508.87

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Solution

The fourth proportional to 20,940.30, 28,897.86 and 11,508.87 is: 15,882.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.30 : 28,897.86 = 11,508.87 : x
  2. Step 2: Convert to fraction form
    20,940.30/28,897.86 = 11,508.87/x
  3. Step 3: Cross multiply
    20,940.30x = 28,897.86 × 11,508.87
  4. Step 4: Simplify right side
    20,940.30x = 332,581,714.02
  5. Step 5: Solve for x
    x = 332,581,714.02/20,940.30
  6. Step 6: Final answer
    x = 15,882.38

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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.