Home / 20,829.24-28,744.32-11,397.80

Finding the Fourth Proportional to 20,829.24, 28,744.32 and 11,397.80

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Solution

The fourth proportional to 20,829.24, 28,744.32 and 11,397.80 is: 15,728.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.24 : 28,744.32 = 11,397.80 : x
  2. Step 2: Convert to fraction form
    20,829.24/28,744.32 = 11,397.80/x
  3. Step 3: Cross multiply
    20,829.24x = 28,744.32 × 11,397.80
  4. Step 4: Simplify right side
    20,829.24x = 327,622,010.50
  5. Step 5: Solve for x
    x = 327,622,010.50/20,829.24
  6. Step 6: Final answer
    x = 15,728.95

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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.