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Finding the Fourth Proportional to 8,971.88, 12,398.28 and 6,729.87

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Solution

The fourth proportional to 8,971.88, 12,398.28 and 6,729.87 is: 9,300.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,971.88 : 12,398.28 = 6,729.87 : x
  2. Step 2: Convert to fraction form
    8,971.88/12,398.28 = 6,729.87/x
  3. Step 3: Cross multiply
    8,971.88x = 12,398.28 × 6,729.87
  4. Step 4: Simplify right side
    8,971.88x = 83,438,738.73
  5. Step 5: Solve for x
    x = 83,438,738.73/8,971.88
  6. Step 6: Final answer
    x = 9,300.03

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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.