Home / 20,681.13-28,540.10-11,249.76

Finding the Fourth Proportional to 20,681.13, 28,540.10 and 11,249.76

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Solution

The fourth proportional to 20,681.13, 28,540.10 and 11,249.76 is: 15,524.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.13 : 28,540.10 = 11,249.76 : x
  2. Step 2: Convert to fraction form
    20,681.13/28,540.10 = 11,249.76/x
  3. Step 3: Cross multiply
    20,681.13x = 28,540.10 × 11,249.76
  4. Step 4: Simplify right side
    20,681.13x = 321,069,275.38
  5. Step 5: Solve for x
    x = 321,069,275.38/20,681.13
  6. Step 6: Final answer
    x = 15,524.75

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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.