Home / 20,381.74-28,113.85-14,724.80

Finding the Fourth Proportional to 20,381.74, 28,113.85 and 14,724.80

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Solution

The fourth proportional to 20,381.74, 28,113.85 and 14,724.80 is: 20,310.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,381.74 : 28,113.85 = 14,724.80 : x
  2. Step 2: Convert to fraction form
    20,381.74/28,113.85 = 14,724.80/x
  3. Step 3: Cross multiply
    20,381.74x = 28,113.85 × 14,724.80
  4. Step 4: Simplify right side
    20,381.74x = 413,970,641.10
  5. Step 5: Solve for x
    x = 413,970,641.10/20,381.74
  6. Step 6: Final answer
    x = 20,310.86

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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.