Home / 11,686.90-16,127.70-6,381.76

Finding the Fourth Proportional to 11,686.90, 16,127.70 and 6,381.76

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Solution

The fourth proportional to 11,686.90, 16,127.70 and 6,381.76 is: 8,806.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,686.90 : 16,127.70 = 6,381.76 : x
  2. Step 2: Convert to fraction form
    11,686.90/16,127.70 = 6,381.76/x
  3. Step 3: Cross multiply
    11,686.90x = 16,127.70 × 6,381.76
  4. Step 4: Simplify right side
    11,686.90x = 102,923,110.75
  5. Step 5: Solve for x
    x = 102,923,110.75/11,686.90
  6. Step 6: Final answer
    x = 8,806.71

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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.