Home / 13,401.18-20,221.79-12,861.72

Finding the Fourth Proportional to 13,401.18, 20,221.79 and 12,861.72

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Solution

The fourth proportional to 13,401.18, 20,221.79 and 12,861.72 is: 19,407.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,401.18 : 20,221.79 = 12,861.72 : x
  2. Step 2: Convert to fraction form
    13,401.18/20,221.79 = 12,861.72/x
  3. Step 3: Cross multiply
    13,401.18x = 20,221.79 × 12,861.72
  4. Step 4: Simplify right side
    13,401.18x = 260,086,936.57
  5. Step 5: Solve for x
    x = 260,086,936.57/13,401.18
  6. Step 6: Final answer
    x = 19,407.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.