Home / 20,279.10-30,418.65-7,132.80

Finding the Fourth Proportional to 20,279.10, 30,418.65 and 7,132.80

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Solution

The fourth proportional to 20,279.10, 30,418.65 and 7,132.80 is: 10,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.10 : 30,418.65 = 7,132.80 : x
  2. Step 2: Convert to fraction form
    20,279.10/30,418.65 = 7,132.80/x
  3. Step 3: Cross multiply
    20,279.10x = 30,418.65 × 7,132.80
  4. Step 4: Simplify right side
    20,279.10x = 216,970,146.72
  5. Step 5: Solve for x
    x = 216,970,146.72/20,279.10
  6. Step 6: Final answer
    x = 10,699.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.