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Finding the Fourth Proportional to 3,886.51, 5,363.37 and 2,118.11

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Solution

The fourth proportional to 3,886.51, 5,363.37 and 2,118.11 is: 2,922.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,886.51 : 5,363.37 = 2,118.11 : x
  2. Step 2: Convert to fraction form
    3,886.51/5,363.37 = 2,118.11/x
  3. Step 3: Cross multiply
    3,886.51x = 5,363.37 × 2,118.11
  4. Step 4: Simplify right side
    3,886.51x = 11,360,228.98
  5. Step 5: Solve for x
    x = 11,360,228.98/3,886.51
  6. Step 6: Final answer
    x = 2,922.99

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.