Home / 12,581.28-18,871.85-3,221.28

Finding the Fourth Proportional to 12,581.28, 18,871.85 and 3,221.28

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Solution

The fourth proportional to 12,581.28, 18,871.85 and 3,221.28 is: 4,831.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.28 : 18,871.85 = 3,221.28 : x
  2. Step 2: Convert to fraction form
    12,581.28/18,871.85 = 3,221.28/x
  3. Step 3: Cross multiply
    12,581.28x = 18,871.85 × 3,221.28
  4. Step 4: Simplify right side
    12,581.28x = 60,791,402.50
  5. Step 5: Solve for x
    x = 60,791,402.50/12,581.28
  6. Step 6: Final answer
    x = 4,831.90

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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.