Home / 20,829.25-28,744.37-11,397.81

Finding the Fourth Proportional to 20,829.25, 28,744.37 and 11,397.81

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Solution

The fourth proportional to 20,829.25, 28,744.37 and 11,397.81 is: 15,728.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.25 : 28,744.37 = 11,397.81 : x
  2. Step 2: Convert to fraction form
    20,829.25/28,744.37 = 11,397.81/x
  3. Step 3: Cross multiply
    20,829.25x = 28,744.37 × 11,397.81
  4. Step 4: Simplify right side
    20,829.25x = 327,622,867.83
  5. Step 5: Solve for x
    x = 327,622,867.83/20,829.25
  6. Step 6: Final answer
    x = 15,728.98

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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.