Home / 20,977.38-28,948.79-11,545.88

Finding the Fourth Proportional to 20,977.38, 28,948.79 and 11,545.88

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Solution

The fourth proportional to 20,977.38, 28,948.79 and 11,545.88 is: 15,933.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.38 : 28,948.79 = 11,545.88 : x
  2. Step 2: Convert to fraction form
    20,977.38/28,948.79 = 11,545.88/x
  3. Step 3: Cross multiply
    20,977.38x = 28,948.79 × 11,545.88
  4. Step 4: Simplify right side
    20,977.38x = 334,239,139.61
  5. Step 5: Solve for x
    x = 334,239,139.61/20,977.38
  6. Step 6: Final answer
    x = 15,933.31

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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.