Home / 20,831.67-28,748.43-11,400.30

Finding the Fourth Proportional to 20,831.67, 28,748.43 and 11,400.30

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Solution

The fourth proportional to 20,831.67, 28,748.43 and 11,400.30 is: 15,732.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.67 : 28,748.43 = 11,400.30 : x
  2. Step 2: Convert to fraction form
    20,831.67/28,748.43 = 11,400.30/x
  3. Step 3: Cross multiply
    20,831.67x = 28,748.43 × 11,400.30
  4. Step 4: Simplify right side
    20,831.67x = 327,740,726.53
  5. Step 5: Solve for x
    x = 327,740,726.53/20,831.67
  6. Step 6: Final answer
    x = 15,732.81

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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.