Home / 11,689.90-16,131.88-6,384.61

Finding the Fourth Proportional to 11,689.90, 16,131.88 and 6,384.61

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Solution

The fourth proportional to 11,689.90, 16,131.88 and 6,384.61 is: 8,810.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,689.90 : 16,131.88 = 6,384.61 : x
  2. Step 2: Convert to fraction form
    11,689.90/16,131.88 = 6,384.61/x
  3. Step 3: Cross multiply
    11,689.90x = 16,131.88 × 6,384.61
  4. Step 4: Simplify right side
    11,689.90x = 102,995,717.73
  5. Step 5: Solve for x
    x = 102,995,717.73/11,689.90
  6. Step 6: Final answer
    x = 8,810.66

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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.