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Finding the Fourth Proportional to 3,621.60, 4,995 and 2,781

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Solution

The fourth proportional to 3,621.60, 4,995 and 2,781 is: 3,835.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,621.60 : 4,995 = 2,781 : x
  2. Step 2: Convert to fraction form
    3,621.60/4,995 = 2,781/x
  3. Step 3: Cross multiply
    3,621.60x = 4,995 × 2,781
  4. Step 4: Simplify right side
    3,621.60x = 13,891,095
  5. Step 5: Solve for x
    x = 13,891,095/3,621.60
  6. Step 6: Final answer
    x = 3,835.62

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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.