Home / 21,831.72-32,761.92-11,977.92

Finding the Fourth Proportional to 21,831.72, 32,761.92 and 11,977.92

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Solution

The fourth proportional to 21,831.72, 32,761.92 and 11,977.92 is: 17,974.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,831.72 : 32,761.92 = 11,977.92 : x
  2. Step 2: Convert to fraction form
    21,831.72/32,761.92 = 11,977.92/x
  3. Step 3: Cross multiply
    21,831.72x = 32,761.92 × 11,977.92
  4. Step 4: Simplify right side
    21,831.72x = 392,419,656.81
  5. Step 5: Solve for x
    x = 392,419,656.81/21,831.72
  6. Step 6: Final answer
    x = 17,974.75

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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.