Home / 20,977.22-28,947.90-11,545.76

Finding the Fourth Proportional to 20,977.22, 28,947.90 and 11,545.76

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Solution

The fourth proportional to 20,977.22, 28,947.90 and 11,545.76 is: 15,932.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.22 : 28,947.90 = 11,545.76 : x
  2. Step 2: Convert to fraction form
    20,977.22/28,947.90 = 11,545.76/x
  3. Step 3: Cross multiply
    20,977.22x = 28,947.90 × 11,545.76
  4. Step 4: Simplify right side
    20,977.22x = 334,225,505.90
  5. Step 5: Solve for x
    x = 334,225,505.90/20,977.22
  6. Step 6: Final answer
    x = 15,932.78

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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.