Home / 4,989.28-6,890.16-4,108

Finding the Fourth Proportional to 4,989.28, 6,890.16 and 4,108

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Solution

The fourth proportional to 4,989.28, 6,890.16 and 4,108 is: 5,673.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.28 : 6,890.16 = 4,108 : x
  2. Step 2: Convert to fraction form
    4,989.28/6,890.16 = 4,108/x
  3. Step 3: Cross multiply
    4,989.28x = 6,890.16 × 4,108
  4. Step 4: Simplify right side
    4,989.28x = 28,304,777.28
  5. Step 5: Solve for x
    x = 28,304,777.28/4,989.28
  6. Step 6: Final answer
    x = 5,673.12

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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.