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Finding the Fourth Proportional to 7,074, 9,762.39 and 3,930.12

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Solution

The fourth proportional to 7,074, 9,762.39 and 3,930.12 is: 5,423.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,074 : 9,762.39 = 3,930.12 : x
  2. Step 2: Convert to fraction form
    7,074/9,762.39 = 3,930.12/x
  3. Step 3: Cross multiply
    7,074x = 9,762.39 × 3,930.12
  4. Step 4: Simplify right side
    7,074x = 38,367,364.19
  5. Step 5: Solve for x
    x = 38,367,364.19/7,074
  6. Step 6: Final answer
    x = 5,423.72

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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.