Home / 8,131.74-12,178.11-4,172.58

Finding the Fourth Proportional to 8,131.74, 12,178.11 and 4,172.58

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Solution

The fourth proportional to 8,131.74, 12,178.11 and 4,172.58 is: 6,248.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,131.74 : 12,178.11 = 4,172.58 : x
  2. Step 2: Convert to fraction form
    8,131.74/12,178.11 = 4,172.58/x
  3. Step 3: Cross multiply
    8,131.74x = 12,178.11 × 4,172.58
  4. Step 4: Simplify right side
    8,131.74x = 50,814,153.87
  5. Step 5: Solve for x
    x = 50,814,153.87/8,131.74
  6. Step 6: Final answer
    x = 6,248.87

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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.