Home / 20,862.50-28,792.66-11,911.28

Finding the Fourth Proportional to 20,862.50, 28,792.66 and 11,911.28

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Solution

The fourth proportional to 20,862.50, 28,792.66 and 11,911.28 is: 16,438.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.50 : 28,792.66 = 11,911.28 : x
  2. Step 2: Convert to fraction form
    20,862.50/28,792.66 = 11,911.28/x
  3. Step 3: Cross multiply
    20,862.50x = 28,792.66 × 11,911.28
  4. Step 4: Simplify right side
    20,862.50x = 342,957,435.20
  5. Step 5: Solve for x
    x = 342,957,435.20/20,862.50
  6. Step 6: Final answer
    x = 16,438.94

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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.