Home / 12,438.40-18,660.48-3,673.12

Finding the Fourth Proportional to 12,438.40, 18,660.48 and 3,673.12

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Solution

The fourth proportional to 12,438.40, 18,660.48 and 3,673.12 is: 5,510.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.40 : 18,660.48 = 3,673.12 : x
  2. Step 2: Convert to fraction form
    12,438.40/18,660.48 = 3,673.12/x
  3. Step 3: Cross multiply
    12,438.40x = 18,660.48 × 3,673.12
  4. Step 4: Simplify right side
    12,438.40x = 68,542,182.30
  5. Step 5: Solve for x
    x = 68,542,182.30/12,438.40
  6. Step 6: Final answer
    x = 5,510.53

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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.