Home / 28,139.35-42,209.13-11,499.43

Finding the Fourth Proportional to 28,139.35, 42,209.13 and 11,499.43

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Solution

The fourth proportional to 28,139.35, 42,209.13 and 11,499.43 is: 17,249.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.35 : 42,209.13 = 11,499.43 : x
  2. Step 2: Convert to fraction form
    28,139.35/42,209.13 = 11,499.43/x
  3. Step 3: Cross multiply
    28,139.35x = 42,209.13 × 11,499.43
  4. Step 4: Simplify right side
    28,139.35x = 485,380,935.80
  5. Step 5: Solve for x
    x = 485,380,935.80/28,139.35
  6. Step 6: Final answer
    x = 17,249.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.