Home / 2,989.50-4,127.58-1,995.90

Finding the Fourth Proportional to 2,989.50, 4,127.58 and 1,995.90

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Solution

The fourth proportional to 2,989.50, 4,127.58 and 1,995.90 is: 2,755.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.50 : 4,127.58 = 1,995.90 : x
  2. Step 2: Convert to fraction form
    2,989.50/4,127.58 = 1,995.90/x
  3. Step 3: Cross multiply
    2,989.50x = 4,127.58 × 1,995.90
  4. Step 4: Simplify right side
    2,989.50x = 8,238,236.92
  5. Step 5: Solve for x
    x = 8,238,236.92/2,989.50
  6. Step 6: Final answer
    x = 2,755.72

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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.