Home / 12,055.20-18,102.87-8,131.72

Finding the Fourth Proportional to 12,055.20, 18,102.87 and 8,131.72

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Solution

The fourth proportional to 12,055.20, 18,102.87 and 8,131.72 is: 12,211.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,055.20 : 18,102.87 = 8,131.72 : x
  2. Step 2: Convert to fraction form
    12,055.20/18,102.87 = 8,131.72/x
  3. Step 3: Cross multiply
    12,055.20x = 18,102.87 × 8,131.72
  4. Step 4: Simplify right side
    12,055.20x = 147,207,384.94
  5. Step 5: Solve for x
    x = 147,207,384.94/12,055.20
  6. Step 6: Final answer
    x = 12,211.11

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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.