Home / 12,146.28-18,219.42-3,381.88

Finding the Fourth Proportional to 12,146.28, 18,219.42 and 3,381.88

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Solution

The fourth proportional to 12,146.28, 18,219.42 and 3,381.88 is: 5,072.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,146.28 : 18,219.42 = 3,381.88 : x
  2. Step 2: Convert to fraction form
    12,146.28/18,219.42 = 3,381.88/x
  3. Step 3: Cross multiply
    12,146.28x = 18,219.42 × 3,381.88
  4. Step 4: Simplify right side
    12,146.28x = 61,615,892.11
  5. Step 5: Solve for x
    x = 61,615,892.11/12,146.28
  6. Step 6: Final answer
    x = 5,072.82

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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.