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Finding the Fourth Proportional to 7,125.57, 9,832.19 and 3,981.15

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Solution

The fourth proportional to 7,125.57, 9,832.19 and 3,981.15 is: 5,493.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.57 : 9,832.19 = 3,981.15 : x
  2. Step 2: Convert to fraction form
    7,125.57/9,832.19 = 3,981.15/x
  3. Step 3: Cross multiply
    7,125.57x = 9,832.19 × 3,981.15
  4. Step 4: Simplify right side
    7,125.57x = 39,143,403.31
  5. Step 5: Solve for x
    x = 39,143,403.31/7,125.57
  6. Step 6: Final answer
    x = 5,493.37

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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.