Home / 13,749.05-20,638.17-12,177.97

Finding the Fourth Proportional to 13,749.05, 20,638.17 and 12,177.97

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Solution

The fourth proportional to 13,749.05, 20,638.17 and 12,177.97 is: 18,279.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.05 : 20,638.17 = 12,177.97 : x
  2. Step 2: Convert to fraction form
    13,749.05/20,638.17 = 12,177.97/x
  3. Step 3: Cross multiply
    13,749.05x = 20,638.17 × 12,177.97
  4. Step 4: Simplify right side
    13,749.05x = 251,331,015.11
  5. Step 5: Solve for x
    x = 251,331,015.11/13,749.05
  6. Step 6: Final answer
    x = 18,279.88

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1.5x scale

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.