Home / 11,691.60-16,134.80-6,386.91

Finding the Fourth Proportional to 11,691.60, 16,134.80 and 6,386.91

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Solution

The fourth proportional to 11,691.60, 16,134.80 and 6,386.91 is: 8,814.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,691.60 : 16,134.80 = 6,386.91 : x
  2. Step 2: Convert to fraction form
    11,691.60/16,134.80 = 6,386.91/x
  3. Step 3: Cross multiply
    11,691.60x = 16,134.80 × 6,386.91
  4. Step 4: Simplify right side
    11,691.60x = 103,051,515.47
  5. Step 5: Solve for x
    x = 103,051,515.47/11,691.60
  6. Step 6: Final answer
    x = 8,814.15

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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.