Home / 12,581.40-18,871.89-3,221.34

Finding the Fourth Proportional to 12,581.40, 18,871.89 and 3,221.34

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Solution

The fourth proportional to 12,581.40, 18,871.89 and 3,221.34 is: 4,831.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.40 : 18,871.89 = 3,221.34 : x
  2. Step 2: Convert to fraction form
    12,581.40/18,871.89 = 3,221.34/x
  3. Step 3: Cross multiply
    12,581.40x = 18,871.89 × 3,221.34
  4. Step 4: Simplify right side
    12,581.40x = 60,792,774.13
  5. Step 5: Solve for x
    x = 60,792,774.13/12,581.40
  6. Step 6: Final answer
    x = 4,831.96

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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.