Home / 31,463.20-43,419.96-18,717.88

Finding the Fourth Proportional to 31,463.20, 43,419.96 and 18,717.88

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Solution

The fourth proportional to 31,463.20, 43,419.96 and 18,717.88 is: 25,831.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,463.20 : 43,419.96 = 18,717.88 : x
  2. Step 2: Convert to fraction form
    31,463.20/43,419.96 = 18,717.88/x
  3. Step 3: Cross multiply
    31,463.20x = 43,419.96 × 18,717.88
  4. Step 4: Simplify right side
    31,463.20x = 812,729,600.88
  5. Step 5: Solve for x
    x = 812,729,600.88/31,463.20
  6. Step 6: Final answer
    x = 25,831.12

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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.