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Finding the Fourth Proportional to 7,963.34, 10,992.45 and 5,309.78

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Solution

The fourth proportional to 7,963.34, 10,992.45 and 5,309.78 is: 7,329.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,963.34 : 10,992.45 = 5,309.78 : x
  2. Step 2: Convert to fraction form
    7,963.34/10,992.45 = 5,309.78/x
  3. Step 3: Cross multiply
    7,963.34x = 10,992.45 × 5,309.78
  4. Step 4: Simplify right side
    7,963.34x = 58,367,436.20
  5. Step 5: Solve for x
    x = 58,367,436.20/7,963.34
  6. Step 6: Final answer
    x = 7,329.52

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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.