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Finding the Fourth Proportional to 2,817.11, 3,889.11 and 2,186.22

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Solution

The fourth proportional to 2,817.11, 3,889.11 and 2,186.22 is: 3,018.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.11 : 3,889.11 = 2,186.22 : x
  2. Step 2: Convert to fraction form
    2,817.11/3,889.11 = 2,186.22/x
  3. Step 3: Cross multiply
    2,817.11x = 3,889.11 × 2,186.22
  4. Step 4: Simplify right side
    2,817.11x = 8,502,472.85
  5. Step 5: Solve for x
    x = 8,502,472.85/2,817.11
  6. Step 6: Final answer
    x = 3,018.15

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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.