Home / 12,143.28-18,214.92-3,378.87

Finding the Fourth Proportional to 12,143.28, 18,214.92 and 3,378.87

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Solution

The fourth proportional to 12,143.28, 18,214.92 and 3,378.87 is: 5,068.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.28 : 18,214.92 = 3,378.87 : x
  2. Step 2: Convert to fraction form
    12,143.28/18,214.92 = 3,378.87/x
  3. Step 3: Cross multiply
    12,143.28x = 18,214.92 × 3,378.87
  4. Step 4: Simplify right side
    12,143.28x = 61,545,846.74
  5. Step 5: Solve for x
    x = 61,545,846.74/12,143.28
  6. Step 6: Final answer
    x = 5,068.31

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Similar ratio
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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.