Home / 20,828.48-28,743.28-11,397.04

Finding the Fourth Proportional to 20,828.48, 28,743.28 and 11,397.04

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Solution

The fourth proportional to 20,828.48, 28,743.28 and 11,397.04 is: 15,727.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.48 : 28,743.28 = 11,397.04 : x
  2. Step 2: Convert to fraction form
    20,828.48/28,743.28 = 11,397.04/x
  3. Step 3: Cross multiply
    20,828.48x = 28,743.28 × 11,397.04
  4. Step 4: Simplify right side
    20,828.48x = 327,588,311.89
  5. Step 5: Solve for x
    x = 327,588,311.89/20,828.48
  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.