Home / 31,719.98-43,778.23-18,288.61

Finding the Fourth Proportional to 31,719.98, 43,778.23 and 18,288.61

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Solution

The fourth proportional to 31,719.98, 43,778.23 and 18,288.61 is: 25,240.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,719.98 : 43,778.23 = 18,288.61 : x
  2. Step 2: Convert to fraction form
    31,719.98/43,778.23 = 18,288.61/x
  3. Step 3: Cross multiply
    31,719.98x = 43,778.23 × 18,288.61
  4. Step 4: Simplify right side
    31,719.98x = 800,642,974.96
  5. Step 5: Solve for x
    x = 800,642,974.96/31,719.98
  6. Step 6: Final answer
    x = 25,240.97

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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.