Home / 7,872.50-11,805.67-3,191.30

Finding the Fourth Proportional to 7,872.50, 11,805.67 and 3,191.30

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Solution

The fourth proportional to 7,872.50, 11,805.67 and 3,191.30 is: 4,785.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,872.50 : 11,805.67 = 3,191.30 : x
  2. Step 2: Convert to fraction form
    7,872.50/11,805.67 = 3,191.30/x
  3. Step 3: Cross multiply
    7,872.50x = 11,805.67 × 3,191.30
  4. Step 4: Simplify right side
    7,872.50x = 37,675,434.67
  5. Step 5: Solve for x
    x = 37,675,434.67/7,872.50
  6. Step 6: Final answer
    x = 4,785.70

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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.