Home / 12,211.20-18,310.74-3,890.13

Finding the Fourth Proportional to 12,211.20, 18,310.74 and 3,890.13

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Solution

The fourth proportional to 12,211.20, 18,310.74 and 3,890.13 is: 5,833.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.20 : 18,310.74 = 3,890.13 : x
  2. Step 2: Convert to fraction form
    12,211.20/18,310.74 = 3,890.13/x
  3. Step 3: Cross multiply
    12,211.20x = 18,310.74 × 3,890.13
  4. Step 4: Simplify right side
    12,211.20x = 71,231,159.00
  5. Step 5: Solve for x
    x = 71,231,159.00/12,211.20
  6. Step 6: Final answer
    x = 5,833.26

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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.