Home / 7,189.56-10,778.82-6,456.90

Finding the Fourth Proportional to 7,189.56, 10,778.82 and 6,456.90

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Solution

The fourth proportional to 7,189.56, 10,778.82 and 6,456.90 is: 9,680.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,189.56 : 10,778.82 = 6,456.90 : x
  2. Step 2: Convert to fraction form
    7,189.56/10,778.82 = 6,456.90/x
  3. Step 3: Cross multiply
    7,189.56x = 10,778.82 × 6,456.90
  4. Step 4: Simplify right side
    7,189.56x = 69,597,762.86
  5. Step 5: Solve for x
    x = 69,597,762.86/7,189.56
  6. Step 6: Final answer
    x = 9,680.39

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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.