Home / 12,278.20-16,943.91-6,689.20

Finding the Fourth Proportional to 12,278.20, 16,943.91 and 6,689.20

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Solution

The fourth proportional to 12,278.20, 16,943.91 and 6,689.20 is: 9,231.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.20 : 16,943.91 = 6,689.20 : x
  2. Step 2: Convert to fraction form
    12,278.20/16,943.91 = 6,689.20/x
  3. Step 3: Cross multiply
    12,278.20x = 16,943.91 × 6,689.20
  4. Step 4: Simplify right side
    12,278.20x = 113,341,118.05
  5. Step 5: Solve for x
    x = 113,341,118.05/12,278.20
  6. Step 6: Final answer
    x = 9,231.09

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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.