Home / 12,228.57-18,347.72-3,909.87

Finding the Fourth Proportional to 12,228.57, 18,347.72 and 3,909.87

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Solution

The fourth proportional to 12,228.57, 18,347.72 and 3,909.87 is: 5,866.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,228.57 : 18,347.72 = 3,909.87 : x
  2. Step 2: Convert to fraction form
    12,228.57/18,347.72 = 3,909.87/x
  3. Step 3: Cross multiply
    12,228.57x = 18,347.72 × 3,909.87
  4. Step 4: Simplify right side
    12,228.57x = 71,737,180.45
  5. Step 5: Solve for x
    x = 71,737,180.45/12,228.57
  6. Step 6: Final answer
    x = 5,866.36

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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.