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Finding the Fourth Proportional to 7,074, 9,762.12 and 3,930.84

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Solution

The fourth proportional to 7,074, 9,762.12 and 3,930.84 is: 5,424.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,074 : 9,762.12 = 3,930.84 : x
  2. Step 2: Convert to fraction form
    7,074/9,762.12 = 3,930.84/x
  3. Step 3: Cross multiply
    7,074x = 9,762.12 × 3,930.84
  4. Step 4: Simplify right side
    7,074x = 38,373,331.78
  5. Step 5: Solve for x
    x = 38,373,331.78/7,074
  6. Step 6: Final answer
    x = 5,424.56

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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.