Home / 4,987.17-6,881.90-2,891.43

Finding the Fourth Proportional to 4,987.17, 6,881.90 and 2,891.43

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Solution

The fourth proportional to 4,987.17, 6,881.90 and 2,891.43 is: 3,989.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.17 : 6,881.90 = 2,891.43 : x
  2. Step 2: Convert to fraction form
    4,987.17/6,881.90 = 2,891.43/x
  3. Step 3: Cross multiply
    4,987.17x = 6,881.90 × 2,891.43
  4. Step 4: Simplify right side
    4,987.17x = 19,898,517.66
  5. Step 5: Solve for x
    x = 19,898,517.66/4,987.17
  6. Step 6: Final answer
    x = 3,989.94

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1.5x scale

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.