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Finding the Fourth Proportional to 7,750.62, 10,695.78 and 4,213.89

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Solution

The fourth proportional to 7,750.62, 10,695.78 and 4,213.89 is: 5,815.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,750.62 : 10,695.78 = 4,213.89 : x
  2. Step 2: Convert to fraction form
    7,750.62/10,695.78 = 4,213.89/x
  3. Step 3: Cross multiply
    7,750.62x = 10,695.78 × 4,213.89
  4. Step 4: Simplify right side
    7,750.62x = 45,070,840.38
  5. Step 5: Solve for x
    x = 45,070,840.38/7,750.62
  6. Step 6: Final answer
    x = 5,815.13

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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.