Home / 21,330.75-31,982.44-8,859.39

Finding the Fourth Proportional to 21,330.75, 31,982.44 and 8,859.39

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Solution

The fourth proportional to 21,330.75, 31,982.44 and 8,859.39 is: 13,283.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.75 : 31,982.44 = 8,859.39 : x
  2. Step 2: Convert to fraction form
    21,330.75/31,982.44 = 8,859.39/x
  3. Step 3: Cross multiply
    21,330.75x = 31,982.44 × 8,859.39
  4. Step 4: Simplify right side
    21,330.75x = 283,344,909.11
  5. Step 5: Solve for x
    x = 283,344,909.11/21,330.75
  6. Step 6: Final answer
    x = 13,283.40

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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.