Home / 13,945.68-20,921.76-4,085.28

Finding the Fourth Proportional to 13,945.68, 20,921.76 and 4,085.28

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Solution

The fourth proportional to 13,945.68, 20,921.76 and 4,085.28 is: 6,128.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,945.68 : 20,921.76 = 4,085.28 : x
  2. Step 2: Convert to fraction form
    13,945.68/20,921.76 = 4,085.28/x
  3. Step 3: Cross multiply
    13,945.68x = 20,921.76 × 4,085.28
  4. Step 4: Simplify right side
    13,945.68x = 85,471,247.69
  5. Step 5: Solve for x
    x = 85,471,247.69/13,945.68
  6. Step 6: Final answer
    x = 6,128.87

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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.