Home / 20,517.75-28,307.42-12,453.95

Finding the Fourth Proportional to 20,517.75, 28,307.42 and 12,453.95

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Solution

The fourth proportional to 20,517.75, 28,307.42 and 12,453.95 is: 17,182.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.75 : 28,307.42 = 12,453.95 : x
  2. Step 2: Convert to fraction form
    20,517.75/28,307.42 = 12,453.95/x
  3. Step 3: Cross multiply
    20,517.75x = 28,307.42 × 12,453.95
  4. Step 4: Simplify right side
    20,517.75x = 352,539,193.31
  5. Step 5: Solve for x
    x = 352,539,193.31/20,517.75
  6. Step 6: Final answer
    x = 17,182.16

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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.