Home / 20,828.80-28,743.42-11,397.16

Finding the Fourth Proportional to 20,828.80, 28,743.42 and 11,397.16

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Solution

The fourth proportional to 20,828.80, 28,743.42 and 11,397.16 is: 15,727.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.80 : 28,743.42 = 11,397.16 : x
  2. Step 2: Convert to fraction form
    20,828.80/28,743.42 = 11,397.16/x
  3. Step 3: Cross multiply
    20,828.80x = 28,743.42 × 11,397.16
  4. Step 4: Simplify right side
    20,828.80x = 327,593,356.69
  5. Step 5: Solve for x
    x = 327,593,356.69/20,828.80
  6. Step 6: Final answer
    x = 15,727.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.