Home / 20,937.95-28,891.11-12,439.85

Finding the Fourth Proportional to 20,937.95, 28,891.11 and 12,439.85

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Solution

The fourth proportional to 20,937.95, 28,891.11 and 12,439.85 is: 17,165.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.95 : 28,891.11 = 12,439.85 : x
  2. Step 2: Convert to fraction form
    20,937.95/28,891.11 = 12,439.85/x
  3. Step 3: Cross multiply
    20,937.95x = 28,891.11 × 12,439.85
  4. Step 4: Simplify right side
    20,937.95x = 359,400,991.97
  5. Step 5: Solve for x
    x = 359,400,991.97/20,937.95
  6. Step 6: Final answer
    x = 17,165.05

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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.