Home / 15,764.88-21,755.68-8,691.55

Finding the Fourth Proportional to 15,764.88, 21,755.68 and 8,691.55

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Solution

The fourth proportional to 15,764.88, 21,755.68 and 8,691.55 is: 11,994.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.88 : 21,755.68 = 8,691.55 : x
  2. Step 2: Convert to fraction form
    15,764.88/21,755.68 = 8,691.55/x
  3. Step 3: Cross multiply
    15,764.88x = 21,755.68 × 8,691.55
  4. Step 4: Simplify right side
    15,764.88x = 189,090,537.05
  5. Step 5: Solve for x
    x = 189,090,537.05/15,764.88
  6. Step 6: Final answer
    x = 11,994.42

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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.