Home / 20,977.42-28,948.62-11,545.78

Finding the Fourth Proportional to 20,977.42, 28,948.62 and 11,545.78

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Solution

The fourth proportional to 20,977.42, 28,948.62 and 11,545.78 is: 15,933.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.42 : 28,948.62 = 11,545.78 : x
  2. Step 2: Convert to fraction form
    20,977.42/28,948.62 = 11,545.78/x
  3. Step 3: Cross multiply
    20,977.42x = 28,948.62 × 11,545.78
  4. Step 4: Simplify right side
    20,977.42x = 334,234,397.82
  5. Step 5: Solve for x
    x = 334,234,397.82/20,977.42
  6. Step 6: Final answer
    x = 15,933.06

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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.