Home / 11,687.08-16,128.07-6,381.90

Finding the Fourth Proportional to 11,687.08, 16,128.07 and 6,381.90

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Solution

The fourth proportional to 11,687.08, 16,128.07 and 6,381.90 is: 8,806.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.08 : 16,128.07 = 6,381.90 : x
  2. Step 2: Convert to fraction form
    11,687.08/16,128.07 = 6,381.90/x
  3. Step 3: Cross multiply
    11,687.08x = 16,128.07 × 6,381.90
  4. Step 4: Simplify right side
    11,687.08x = 102,927,729.93
  5. Step 5: Solve for x
    x = 102,927,729.93/11,687.08
  6. Step 6: Final answer
    x = 8,806.97

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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.