Home / 20,829.13-28,744.20-11,397.69

Finding the Fourth Proportional to 20,829.13, 28,744.20 and 11,397.69

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Solution

The fourth proportional to 20,829.13, 28,744.20 and 11,397.69 is: 15,728.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.13 : 28,744.20 = 11,397.69 : x
  2. Step 2: Convert to fraction form
    20,829.13/28,744.20 = 11,397.69/x
  3. Step 3: Cross multiply
    20,829.13x = 28,744.20 × 11,397.69
  4. Step 4: Simplify right side
    20,829.13x = 327,617,423.91
  5. Step 5: Solve for x
    x = 327,617,423.91/20,829.13
  6. Step 6: Final answer
    x = 15,728.81

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