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Finding the Fourth Proportional to 7,039.68, 9,708.12 and 5,251.11

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Solution

The fourth proportional to 7,039.68, 9,708.12 and 5,251.11 is: 7,241.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,039.68 : 9,708.12 = 5,251.11 : x
  2. Step 2: Convert to fraction form
    7,039.68/9,708.12 = 5,251.11/x
  3. Step 3: Cross multiply
    7,039.68x = 9,708.12 × 5,251.11
  4. Step 4: Simplify right side
    7,039.68x = 50,978,406.01
  5. Step 5: Solve for x
    x = 50,978,406.01/7,039.68
  6. Step 6: Final answer
    x = 7,241.58

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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.