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Finding the Fourth Proportional to 5,631.78, 7,773.11 and 3,275.28

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Solution

The fourth proportional to 5,631.78, 7,773.11 and 3,275.28 is: 4,520.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,631.78 : 7,773.11 = 3,275.28 : x
  2. Step 2: Convert to fraction form
    5,631.78/7,773.11 = 3,275.28/x
  3. Step 3: Cross multiply
    5,631.78x = 7,773.11 × 3,275.28
  4. Step 4: Simplify right side
    5,631.78x = 25,459,111.72
  5. Step 5: Solve for x
    x = 25,459,111.72/5,631.78
  6. Step 6: Final answer
    x = 4,520.62

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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.