Home / 20,726.97-31,090.22-12,409.31

Finding the Fourth Proportional to 20,726.97, 31,090.22 and 12,409.31

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Solution

The fourth proportional to 20,726.97, 31,090.22 and 12,409.31 is: 18,613.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,726.97 : 31,090.22 = 12,409.31 : x
  2. Step 2: Convert to fraction form
    20,726.97/31,090.22 = 12,409.31/x
  3. Step 3: Cross multiply
    20,726.97x = 31,090.22 × 12,409.31
  4. Step 4: Simplify right side
    20,726.97x = 385,808,115.73
  5. Step 5: Solve for x
    x = 385,808,115.73/20,726.97
  6. Step 6: Final answer
    x = 18,613.82

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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.