Home / 20,988.26-28,960.57-12,487.48

Finding the Fourth Proportional to 20,988.26, 28,960.57 and 12,487.48

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Solution

The fourth proportional to 20,988.26, 28,960.57 and 12,487.48 is: 17,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.26 : 28,960.57 = 12,487.48 : x
  2. Step 2: Convert to fraction form
    20,988.26/28,960.57 = 12,487.48/x
  3. Step 3: Cross multiply
    20,988.26x = 28,960.57 × 12,487.48
  4. Step 4: Simplify right side
    20,988.26x = 361,644,481.87
  5. Step 5: Solve for x
    x = 361,644,481.87/20,988.26
  6. Step 6: Final answer
    x = 17,230.80

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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.