Home / 12,278.25-16,943.99-6,689.61

Finding the Fourth Proportional to 12,278.25, 16,943.99 and 6,689.61

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Solution

The fourth proportional to 12,278.25, 16,943.99 and 6,689.61 is: 9,231.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.25 : 16,943.99 = 6,689.61 : x
  2. Step 2: Convert to fraction form
    12,278.25/16,943.99 = 6,689.61/x
  3. Step 3: Cross multiply
    12,278.25x = 16,943.99 × 6,689.61
  4. Step 4: Simplify right side
    12,278.25x = 113,348,651.50
  5. Step 5: Solve for x
    x = 113,348,651.50/12,278.25
  6. Step 6: Final answer
    x = 9,231.66

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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.