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Finding the Fourth Proportional to 7,115.67, 10,678.11 and 3,220.11

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Solution

The fourth proportional to 7,115.67, 10,678.11 and 3,220.11 is: 4,832.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.67 : 10,678.11 = 3,220.11 : x
  2. Step 2: Convert to fraction form
    7,115.67/10,678.11 = 3,220.11/x
  3. Step 3: Cross multiply
    7,115.67x = 10,678.11 × 3,220.11
  4. Step 4: Simplify right side
    7,115.67x = 34,384,688.79
  5. Step 5: Solve for x
    x = 34,384,688.79/7,115.67
  6. Step 6: Final answer
    x = 4,832.25

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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.