Home / 20,940.08-28,897.84-11,508.88

Finding the Fourth Proportional to 20,940.08, 28,897.84 and 11,508.88

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Solution

The fourth proportional to 20,940.08, 28,897.84 and 11,508.88 is: 15,882.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.08 : 28,897.84 = 11,508.88 : x
  2. Step 2: Convert to fraction form
    20,940.08/28,897.84 = 11,508.88/x
  3. Step 3: Cross multiply
    20,940.08x = 28,897.84 × 11,508.88
  4. Step 4: Simplify right side
    20,940.08x = 332,581,772.82
  5. Step 5: Solve for x
    x = 332,581,772.82/20,940.08
  6. Step 6: Final answer
    x = 15,882.55

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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.