Home / 20,835.22-28,752.60-11,403.78

Finding the Fourth Proportional to 20,835.22, 28,752.60 and 11,403.78

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Solution

The fourth proportional to 20,835.22, 28,752.60 and 11,403.78 is: 15,737.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.22 : 28,752.60 = 11,403.78 : x
  2. Step 2: Convert to fraction form
    20,835.22/28,752.60 = 11,403.78/x
  3. Step 3: Cross multiply
    20,835.22x = 28,752.60 × 11,403.78
  4. Step 4: Simplify right side
    20,835.22x = 327,888,324.83
  5. Step 5: Solve for x
    x = 327,888,324.83/20,835.22
  6. Step 6: Final answer
    x = 15,737.21

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1.5x scale

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.