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Finding the Fourth Proportional to 7,125.75, 9,833.75 and 3,981.95

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Solution

The fourth proportional to 7,125.75, 9,833.75 and 3,981.95 is: 5,495.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.75 : 9,833.75 = 3,981.95 : x
  2. Step 2: Convert to fraction form
    7,125.75/9,833.75 = 3,981.95/x
  3. Step 3: Cross multiply
    7,125.75x = 9,833.75 × 3,981.95
  4. Step 4: Simplify right side
    7,125.75x = 39,157,431.73
  5. Step 5: Solve for x
    x = 39,157,431.73/7,125.75
  6. Step 6: Final answer
    x = 5,495.20

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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.