Home / 20,829.76-28,736.24-12,766.56

Finding the Fourth Proportional to 20,829.76, 28,736.24 and 12,766.56

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Solution

The fourth proportional to 20,829.76, 28,736.24 and 12,766.56 is: 17,612.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.76 : 28,736.24 = 12,766.56 : x
  2. Step 2: Convert to fraction form
    20,829.76/28,736.24 = 12,766.56/x
  3. Step 3: Cross multiply
    20,829.76x = 28,736.24 × 12,766.56
  4. Step 4: Simplify right side
    20,829.76x = 366,862,932.13
  5. Step 5: Solve for x
    x = 366,862,932.13/20,829.76
  6. Step 6: Final answer
    x = 17,612.44

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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.