Home / 20,345.22-28,078.17-11,392.56

Finding the Fourth Proportional to 20,345.22, 28,078.17 and 11,392.56

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Solution

The fourth proportional to 20,345.22, 28,078.17 and 11,392.56 is: 15,722.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.22 : 28,078.17 = 11,392.56 : x
  2. Step 2: Convert to fraction form
    20,345.22/28,078.17 = 11,392.56/x
  3. Step 3: Cross multiply
    20,345.22x = 28,078.17 × 11,392.56
  4. Step 4: Simplify right side
    20,345.22x = 319,882,236.42
  5. Step 5: Solve for x
    x = 319,882,236.42/20,345.22
  6. Step 6: Final answer
    x = 15,722.72

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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.