Home / 12,240.40-18,355.92-3,918.64

Finding the Fourth Proportional to 12,240.40, 18,355.92 and 3,918.64

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Solution

The fourth proportional to 12,240.40, 18,355.92 and 3,918.64 is: 5,876.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,240.40 : 18,355.92 = 3,918.64 : x
  2. Step 2: Convert to fraction form
    12,240.40/18,355.92 = 3,918.64/x
  3. Step 3: Cross multiply
    12,240.40x = 18,355.92 × 3,918.64
  4. Step 4: Simplify right side
    12,240.40x = 71,930,242.35
  5. Step 5: Solve for x
    x = 71,930,242.35/12,240.40
  6. Step 6: Final answer
    x = 5,876.46

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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.