Home / 8,121.15-12,184.20-3,438.72

Finding the Fourth Proportional to 8,121.15, 12,184.20 and 3,438.72

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Solution

The fourth proportional to 8,121.15, 12,184.20 and 3,438.72 is: 5,159.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.15 : 12,184.20 = 3,438.72 : x
  2. Step 2: Convert to fraction form
    8,121.15/12,184.20 = 3,438.72/x
  3. Step 3: Cross multiply
    8,121.15x = 12,184.20 × 3,438.72
  4. Step 4: Simplify right side
    8,121.15x = 41,898,052.22
  5. Step 5: Solve for x
    x = 41,898,052.22/8,121.15
  6. Step 6: Final answer
    x = 5,159.13

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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.