Home / 12,219.38-18,329.40-4,320.78

Finding the Fourth Proportional to 12,219.38, 18,329.40 and 4,320.78

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Solution

The fourth proportional to 12,219.38, 18,329.40 and 4,320.78 is: 6,481.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.38 : 18,329.40 = 4,320.78 : x
  2. Step 2: Convert to fraction form
    12,219.38/18,329.40 = 4,320.78/x
  3. Step 3: Cross multiply
    12,219.38x = 18,329.40 × 4,320.78
  4. Step 4: Simplify right side
    12,219.38x = 79,197,304.93
  5. Step 5: Solve for x
    x = 79,197,304.93/12,219.38
  6. Step 6: Final answer
    x = 6,481.29

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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.