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Finding the Fourth Proportional to 7,750.65, 10,695.78 and 4,213.83

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Solution

The fourth proportional to 7,750.65, 10,695.78 and 4,213.83 is: 5,815.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,750.65 : 10,695.78 = 4,213.83 : x
  2. Step 2: Convert to fraction form
    7,750.65/10,695.78 = 4,213.83/x
  3. Step 3: Cross multiply
    7,750.65x = 10,695.78 × 4,213.83
  4. Step 4: Simplify right side
    7,750.65x = 45,070,198.64
  5. Step 5: Solve for x
    x = 45,070,198.64/7,750.65
  6. Step 6: Final answer
    x = 5,815.02

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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.