Home / 13,939.40-20,908.72-3,409.48

Finding the Fourth Proportional to 13,939.40, 20,908.72 and 3,409.48

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Solution

The fourth proportional to 13,939.40, 20,908.72 and 3,409.48 is: 5,114.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.40 : 20,908.72 = 3,409.48 : x
  2. Step 2: Convert to fraction form
    13,939.40/20,908.72 = 3,409.48/x
  3. Step 3: Cross multiply
    13,939.40x = 20,908.72 × 3,409.48
  4. Step 4: Simplify right side
    13,939.40x = 71,287,862.67
  5. Step 5: Solve for x
    x = 71,287,862.67/13,939.40
  6. Step 6: Final answer
    x = 5,114.13

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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.