Home / 2,989.36-4,127.12-1,871.96

Finding the Fourth Proportional to 2,989.36, 4,127.12 and 1,871.96

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Solution

The fourth proportional to 2,989.36, 4,127.12 and 1,871.96 is: 2,584.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.36 : 4,127.12 = 1,871.96 : x
  2. Step 2: Convert to fraction form
    2,989.36/4,127.12 = 1,871.96/x
  3. Step 3: Cross multiply
    2,989.36x = 4,127.12 × 1,871.96
  4. Step 4: Simplify right side
    2,989.36x = 7,725,803.56
  5. Step 5: Solve for x
    x = 7,725,803.56/2,989.36
  6. Step 6: Final answer
    x = 2,584.43

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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.