Home / 2,988.90-4,118.45-2,781.27

Finding the Fourth Proportional to 2,988.90, 4,118.45 and 2,781.27

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Solution

The fourth proportional to 2,988.90, 4,118.45 and 2,781.27 is: 3,832.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.90 : 4,118.45 = 2,781.27 : x
  2. Step 2: Convert to fraction form
    2,988.90/4,118.45 = 2,781.27/x
  3. Step 3: Cross multiply
    2,988.90x = 4,118.45 × 2,781.27
  4. Step 4: Simplify right side
    2,988.90x = 11,454,507.53
  5. Step 5: Solve for x
    x = 11,454,507.53/2,988.90
  6. Step 6: Final answer
    x = 3,832.35

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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.