Home / 20,829.30-28,745.19-11,397.93

Finding the Fourth Proportional to 20,829.30, 28,745.19 and 11,397.93

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Solution

The fourth proportional to 20,829.30, 28,745.19 and 11,397.93 is: 15,729.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.30 : 28,745.19 = 11,397.93 : x
  2. Step 2: Convert to fraction form
    20,829.30/28,745.19 = 11,397.93/x
  3. Step 3: Cross multiply
    20,829.30x = 28,745.19 × 11,397.93
  4. Step 4: Simplify right side
    20,829.30x = 327,635,663.46
  5. Step 5: Solve for x
    x = 327,635,663.46/20,829.30
  6. Step 6: Final answer
    x = 15,729.56

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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.