Home / 31,340.68-43,252.05-20,711.86

Finding the Fourth Proportional to 31,340.68, 43,252.05 and 20,711.86

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Solution

The fourth proportional to 31,340.68, 43,252.05 and 20,711.86 is: 28,583.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,340.68 : 43,252.05 = 20,711.86 : x
  2. Step 2: Convert to fraction form
    31,340.68/43,252.05 = 20,711.86/x
  3. Step 3: Cross multiply
    31,340.68x = 43,252.05 × 20,711.86
  4. Step 4: Simplify right side
    31,340.68x = 895,830,404.31
  5. Step 5: Solve for x
    x = 895,830,404.31/31,340.68
  6. Step 6: Final answer
    x = 28,583.63

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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.