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Finding the Fourth Proportional to 6,639.29, 9,945.88 and 3,860.12

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Solution

The fourth proportional to 6,639.29, 9,945.88 and 3,860.12 is: 5,782.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.29 : 9,945.88 = 3,860.12 : x
  2. Step 2: Convert to fraction form
    6,639.29/9,945.88 = 3,860.12/x
  3. Step 3: Cross multiply
    6,639.29x = 9,945.88 × 3,860.12
  4. Step 4: Simplify right side
    6,639.29x = 38,392,230.93
  5. Step 5: Solve for x
    x = 38,392,230.93/6,639.29
  6. Step 6: Final answer
    x = 5,782.59

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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.