Home / 12,165.42-16,788.36-7,691.18

Finding the Fourth Proportional to 12,165.42, 16,788.36 and 7,691.18

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Solution

The fourth proportional to 12,165.42, 16,788.36 and 7,691.18 is: 10,613.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,165.42 : 16,788.36 = 7,691.18 : x
  2. Step 2: Convert to fraction form
    12,165.42/16,788.36 = 7,691.18/x
  3. Step 3: Cross multiply
    12,165.42x = 16,788.36 × 7,691.18
  4. Step 4: Simplify right side
    12,165.42x = 129,122,298.66
  5. Step 5: Solve for x
    x = 129,122,298.66/12,165.42
  6. Step 6: Final answer
    x = 10,613.88

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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.