Home / 11,687.90-16,129.08-6,382.76

Finding the Fourth Proportional to 11,687.90, 16,129.08 and 6,382.76

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Solution

The fourth proportional to 11,687.90, 16,129.08 and 6,382.76 is: 8,808.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.90 : 16,129.08 = 6,382.76 : x
  2. Step 2: Convert to fraction form
    11,687.90/16,129.08 = 6,382.76/x
  3. Step 3: Cross multiply
    11,687.90x = 16,129.08 × 6,382.76
  4. Step 4: Simplify right side
    11,687.90x = 102,948,046.66
  5. Step 5: Solve for x
    x = 102,948,046.66/11,687.90
  6. Step 6: Final answer
    x = 8,808.09

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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.