Home / 12,178.42-18,256.66-4,381.75

Finding the Fourth Proportional to 12,178.42, 18,256.66 and 4,381.75

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Solution

The fourth proportional to 12,178.42, 18,256.66 and 4,381.75 is: 6,568.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,178.42 : 18,256.66 = 4,381.75 : x
  2. Step 2: Convert to fraction form
    12,178.42/18,256.66 = 4,381.75/x
  3. Step 3: Cross multiply
    12,178.42x = 18,256.66 × 4,381.75
  4. Step 4: Simplify right side
    12,178.42x = 79,996,119.96
  5. Step 5: Solve for x
    x = 79,996,119.96/12,178.42
  6. Step 6: Final answer
    x = 6,568.68

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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.