Home / 20,764.32-31,114.19-8,278.71

Finding the Fourth Proportional to 20,764.32, 31,114.19 and 8,278.71

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Solution

The fourth proportional to 20,764.32, 31,114.19 and 8,278.71 is: 12,405.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.32 : 31,114.19 = 8,278.71 : x
  2. Step 2: Convert to fraction form
    20,764.32/31,114.19 = 8,278.71/x
  3. Step 3: Cross multiply
    20,764.32x = 31,114.19 × 8,278.71
  4. Step 4: Simplify right side
    20,764.32x = 257,585,259.91
  5. Step 5: Solve for x
    x = 257,585,259.91/20,764.32
  6. Step 6: Final answer
    x = 12,405.19

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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.