Home / 12,211.31-18,318.30-3,889.38

Finding the Fourth Proportional to 12,211.31, 18,318.30 and 3,889.38

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Solution

The fourth proportional to 12,211.31, 18,318.30 and 3,889.38 is: 5,834.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.31 : 18,318.30 = 3,889.38 : x
  2. Step 2: Convert to fraction form
    12,211.31/18,318.30 = 3,889.38/x
  3. Step 3: Cross multiply
    12,211.31x = 18,318.30 × 3,889.38
  4. Step 4: Simplify right side
    12,211.31x = 71,246,829.65
  5. Step 5: Solve for x
    x = 71,246,829.65/12,211.31
  6. Step 6: Final answer
    x = 5,834.50

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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.