Home / 20,839.85-28,729.10-14,861.15

Finding the Fourth Proportional to 20,839.85, 28,729.10 and 14,861.15

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Solution

The fourth proportional to 20,839.85, 28,729.10 and 14,861.15 is: 20,487.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.85 : 28,729.10 = 14,861.15 : x
  2. Step 2: Convert to fraction form
    20,839.85/28,729.10 = 14,861.15/x
  3. Step 3: Cross multiply
    20,839.85x = 28,729.10 × 14,861.15
  4. Step 4: Simplify right side
    20,839.85x = 426,947,464.47
  5. Step 5: Solve for x
    x = 426,947,464.47/20,839.85
  6. Step 6: Final answer
    x = 20,487.07

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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.