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Finding the Fourth Proportional to 5,276.72, 7,912.74 and 2,811.08

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Solution

The fourth proportional to 5,276.72, 7,912.74 and 2,811.08 is: 4,215.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,276.72 : 7,912.74 = 2,811.08 : x
  2. Step 2: Convert to fraction form
    5,276.72/7,912.74 = 2,811.08/x
  3. Step 3: Cross multiply
    5,276.72x = 7,912.74 × 2,811.08
  4. Step 4: Simplify right side
    5,276.72x = 22,243,345.16
  5. Step 5: Solve for x
    x = 22,243,345.16/5,276.72
  6. Step 6: Final answer
    x = 4,215.37

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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.