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Finding the Fourth Proportional to 7,806.85, 10,772.19 and 4,449.73

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Solution

The fourth proportional to 7,806.85, 10,772.19 and 4,449.73 is: 6,139.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,806.85 : 10,772.19 = 4,449.73 : x
  2. Step 2: Convert to fraction form
    7,806.85/10,772.19 = 4,449.73/x
  3. Step 3: Cross multiply
    7,806.85x = 10,772.19 × 4,449.73
  4. Step 4: Simplify right side
    7,806.85x = 47,933,337.01
  5. Step 5: Solve for x
    x = 47,933,337.01/7,806.85
  6. Step 6: Final answer
    x = 6,139.91

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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.