Home / 21,228.82-31,831.02-8,757.42

Finding the Fourth Proportional to 21,228.82, 31,831.02 and 8,757.42

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Solution

The fourth proportional to 21,228.82, 31,831.02 and 8,757.42 is: 13,131.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.82 : 31,831.02 = 8,757.42 : x
  2. Step 2: Convert to fraction form
    21,228.82/31,831.02 = 8,757.42/x
  3. Step 3: Cross multiply
    21,228.82x = 31,831.02 × 8,757.42
  4. Step 4: Simplify right side
    21,228.82x = 278,757,611.17
  5. Step 5: Solve for x
    x = 278,757,611.17/21,228.82
  6. Step 6: Final answer
    x = 13,131.09

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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.