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Finding the Fourth Proportional to 6,930, 10,391.76 and 2,309.76

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Solution

The fourth proportional to 6,930, 10,391.76 and 2,309.76 is: 3,463.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,930 : 10,391.76 = 2,309.76 : x
  2. Step 2: Convert to fraction form
    6,930/10,391.76 = 2,309.76/x
  3. Step 3: Cross multiply
    6,930x = 10,391.76 × 2,309.76
  4. Step 4: Simplify right side
    6,930x = 24,002,471.58
  5. Step 5: Solve for x
    x = 24,002,471.58/6,930
  6. Step 6: Final answer
    x = 3,463.56

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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.