Home / 8,123.10-12,175.65-3,191.10

Finding the Fourth Proportional to 8,123.10, 12,175.65 and 3,191.10

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Solution

The fourth proportional to 8,123.10, 12,175.65 and 3,191.10 is: 4,783.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,123.10 : 12,175.65 = 3,191.10 : x
  2. Step 2: Convert to fraction form
    8,123.10/12,175.65 = 3,191.10/x
  3. Step 3: Cross multiply
    8,123.10x = 12,175.65 × 3,191.10
  4. Step 4: Simplify right side
    8,123.10x = 38,853,716.72
  5. Step 5: Solve for x
    x = 38,853,716.72/8,123.10
  6. Step 6: Final answer
    x = 4,783.11

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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.