Home / 7,115.20-10,647.60-6,200.80

Finding the Fourth Proportional to 7,115.20, 10,647.60 and 6,200.80

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Solution

The fourth proportional to 7,115.20, 10,647.60 and 6,200.80 is: 9,279.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.20 : 10,647.60 = 6,200.80 : x
  2. Step 2: Convert to fraction form
    7,115.20/10,647.60 = 6,200.80/x
  3. Step 3: Cross multiply
    7,115.20x = 10,647.60 × 6,200.80
  4. Step 4: Simplify right side
    7,115.20x = 66,023,638.08
  5. Step 5: Solve for x
    x = 66,023,638.08/7,115.20
  6. Step 6: Final answer
    x = 9,279.24

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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.