Home / 20,927.56-28,867.97-12,539.20

Finding the Fourth Proportional to 20,927.56, 28,867.97 and 12,539.20

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Solution

The fourth proportional to 20,927.56, 28,867.97 and 12,539.20 is: 17,296.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.56 : 28,867.97 = 12,539.20 : x
  2. Step 2: Convert to fraction form
    20,927.56/28,867.97 = 12,539.20/x
  3. Step 3: Cross multiply
    20,927.56x = 28,867.97 × 12,539.20
  4. Step 4: Simplify right side
    20,927.56x = 361,981,249.42
  5. Step 5: Solve for x
    x = 361,981,249.42/20,927.56
  6. Step 6: Final answer
    x = 17,296.87

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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.