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Finding the Fourth Proportional to 7,969.87, 11,000.24 and 5,170.51

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Solution

The fourth proportional to 7,969.87, 11,000.24 and 5,170.51 is: 7,136.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,969.87 : 11,000.24 = 5,170.51 : x
  2. Step 2: Convert to fraction form
    7,969.87/11,000.24 = 5,170.51/x
  3. Step 3: Cross multiply
    7,969.87x = 11,000.24 × 5,170.51
  4. Step 4: Simplify right side
    7,969.87x = 56,876,850.92
  5. Step 5: Solve for x
    x = 56,876,850.92/7,969.87
  6. Step 6: Final answer
    x = 7,136.48

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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.