Home / 12,115.12-18,178.20-10,955.92

Finding the Fourth Proportional to 12,115.12, 18,178.20 and 10,955.92

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Solution

The fourth proportional to 12,115.12, 18,178.20 and 10,955.92 is: 16,438.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.12 : 18,178.20 = 10,955.92 : x
  2. Step 2: Convert to fraction form
    12,115.12/18,178.20 = 10,955.92/x
  3. Step 3: Cross multiply
    12,115.12x = 18,178.20 × 10,955.92
  4. Step 4: Simplify right side
    12,115.12x = 199,158,904.94
  5. Step 5: Solve for x
    x = 199,158,904.94/12,115.12
  6. Step 6: Final answer
    x = 16,438.87

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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.