Home / 12,279.29-18,418.96-3,959.91

Finding the Fourth Proportional to 12,279.29, 18,418.96 and 3,959.91

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Solution

The fourth proportional to 12,279.29, 18,418.96 and 3,959.91 is: 5,939.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.29 : 18,418.96 = 3,959.91 : x
  2. Step 2: Convert to fraction form
    12,279.29/18,418.96 = 3,959.91/x
  3. Step 3: Cross multiply
    12,279.29x = 18,418.96 × 3,959.91
  4. Step 4: Simplify right side
    12,279.29x = 72,937,423.89
  5. Step 5: Solve for x
    x = 72,937,423.89/12,279.29
  6. Step 6: Final answer
    x = 5,939.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.