Home / 31,433.76-43,372.80-18,691.20

Finding the Fourth Proportional to 31,433.76, 43,372.80 and 18,691.20

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Solution

The fourth proportional to 31,433.76, 43,372.80 and 18,691.20 is: 25,790.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,433.76 : 43,372.80 = 18,691.20 : x
  2. Step 2: Convert to fraction form
    31,433.76/43,372.80 = 18,691.20/x
  3. Step 3: Cross multiply
    31,433.76x = 43,372.80 × 18,691.20
  4. Step 4: Simplify right side
    31,433.76x = 810,689,679.36
  5. Step 5: Solve for x
    x = 810,689,679.36/31,433.76
  6. Step 6: Final answer
    x = 25,790.41

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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.