Home / 31,108.92-42,944.76-18,357.90

Finding the Fourth Proportional to 31,108.92, 42,944.76 and 18,357.90

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Solution

The fourth proportional to 31,108.92, 42,944.76 and 18,357.90 is: 25,342.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.92 : 42,944.76 = 18,357.90 : x
  2. Step 2: Convert to fraction form
    31,108.92/42,944.76 = 18,357.90/x
  3. Step 3: Cross multiply
    31,108.92x = 42,944.76 × 18,357.90
  4. Step 4: Simplify right side
    31,108.92x = 788,375,609.60
  5. Step 5: Solve for x
    x = 788,375,609.60/31,108.92
  6. Step 6: Final answer
    x = 25,342.43

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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.