Home / 20,377.47-28,120.55-11,424.95

Finding the Fourth Proportional to 20,377.47, 28,120.55 and 11,424.95

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Solution

The fourth proportional to 20,377.47, 28,120.55 and 11,424.95 is: 15,766.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.47 : 28,120.55 = 11,424.95 : x
  2. Step 2: Convert to fraction form
    20,377.47/28,120.55 = 11,424.95/x
  3. Step 3: Cross multiply
    20,377.47x = 28,120.55 × 11,424.95
  4. Step 4: Simplify right side
    20,377.47x = 321,275,737.12
  5. Step 5: Solve for x
    x = 321,275,737.12/20,377.47
  6. Step 6: Final answer
    x = 15,766.22

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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.