Home / 8,115.54-11,189.25-6,621.94

Finding the Fourth Proportional to 8,115.54, 11,189.25 and 6,621.94

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Solution

The fourth proportional to 8,115.54, 11,189.25 and 6,621.94 is: 9,129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.54 : 11,189.25 = 6,621.94 : x
  2. Step 2: Convert to fraction form
    8,115.54/11,189.25 = 6,621.94/x
  3. Step 3: Cross multiply
    8,115.54x = 11,189.25 × 6,621.94
  4. Step 4: Simplify right side
    8,115.54x = 74,094,542.15
  5. Step 5: Solve for x
    x = 74,094,542.15/8,115.54
  6. Step 6: Final answer
    x = 9,129.96

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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.