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Finding the Fourth Proportional to 7,121.78, 10,671.66 and 4,934.78

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Solution

The fourth proportional to 7,121.78, 10,671.66 and 4,934.78 is: 7,394.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.78 : 10,671.66 = 4,934.78 : x
  2. Step 2: Convert to fraction form
    7,121.78/10,671.66 = 4,934.78/x
  3. Step 3: Cross multiply
    7,121.78x = 10,671.66 × 4,934.78
  4. Step 4: Simplify right side
    7,121.78x = 52,662,294.33
  5. Step 5: Solve for x
    x = 52,662,294.33/7,121.78
  6. Step 6: Final answer
    x = 7,394.54

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1.5x scale

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.