Home / 7,190.20-10,778.90-6,412.60

Finding the Fourth Proportional to 7,190.20, 10,778.90 and 6,412.60

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Solution

The fourth proportional to 7,190.20, 10,778.90 and 6,412.60 is: 9,613.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190.20 : 10,778.90 = 6,412.60 : x
  2. Step 2: Convert to fraction form
    7,190.20/10,778.90 = 6,412.60/x
  3. Step 3: Cross multiply
    7,190.20x = 10,778.90 × 6,412.60
  4. Step 4: Simplify right side
    7,190.20x = 69,120,774.14
  5. Step 5: Solve for x
    x = 69,120,774.14/7,190.20
  6. Step 6: Final answer
    x = 9,613.19

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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.