Home / 36,129.28-54,156.72-20,513.92

Finding the Fourth Proportional to 36,129.28, 54,156.72 and 20,513.92

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Solution

The fourth proportional to 36,129.28, 54,156.72 and 20,513.92 is: 30,749.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,129.28 : 54,156.72 = 20,513.92 : x
  2. Step 2: Convert to fraction form
    36,129.28/54,156.72 = 20,513.92/x
  3. Step 3: Cross multiply
    36,129.28x = 54,156.72 × 20,513.92
  4. Step 4: Simplify right side
    36,129.28x = 1,110,966,621.54
  5. Step 5: Solve for x
    x = 1,110,966,621.54/36,129.28
  6. Step 6: Final answer
    x = 30,749.76

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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.