Home / 11,691.78-16,134.84-6,386.82

Finding the Fourth Proportional to 11,691.78, 16,134.84 and 6,386.82

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Solution

The fourth proportional to 11,691.78, 16,134.84 and 6,386.82 is: 8,813.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,691.78 : 16,134.84 = 6,386.82 : x
  2. Step 2: Convert to fraction form
    11,691.78/16,134.84 = 6,386.82/x
  3. Step 3: Cross multiply
    11,691.78x = 16,134.84 × 6,386.82
  4. Step 4: Simplify right side
    11,691.78x = 103,050,318.81
  5. Step 5: Solve for x
    x = 103,050,318.81/11,691.78
  6. Step 6: Final answer
    x = 8,813.91

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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.