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Finding the Fourth Proportional to 5,102.79, 7,656 and 2,181.32

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Solution

The fourth proportional to 5,102.79, 7,656 and 2,181.32 is: 3,272.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,102.79 : 7,656 = 2,181.32 : x
  2. Step 2: Convert to fraction form
    5,102.79/7,656 = 2,181.32/x
  3. Step 3: Cross multiply
    5,102.79x = 7,656 × 2,181.32
  4. Step 4: Simplify right side
    5,102.79x = 16,700,185.92
  5. Step 5: Solve for x
    x = 16,700,185.92/5,102.79
  6. Step 6: Final answer
    x = 3,272.76

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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.