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Finding the Fourth Proportional to 3,620, 4,995.60 and 2,127.90

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Solution

The fourth proportional to 3,620, 4,995.60 and 2,127.90 is: 2,936.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620 : 4,995.60 = 2,127.90 : x
  2. Step 2: Convert to fraction form
    3,620/4,995.60 = 2,127.90/x
  3. Step 3: Cross multiply
    3,620x = 4,995.60 × 2,127.90
  4. Step 4: Simplify right side
    3,620x = 10,630,137.24
  5. Step 5: Solve for x
    x = 10,630,137.24/3,620
  6. Step 6: Final answer
    x = 2,936.50

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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.