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Finding the Fourth Proportional to 7,761.51, 11,642.94 and 2,214.73

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Solution

The fourth proportional to 7,761.51, 11,642.94 and 2,214.73 is: 3,322.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,761.51 : 11,642.94 = 2,214.73 : x
  2. Step 2: Convert to fraction form
    7,761.51/11,642.94 = 2,214.73/x
  3. Step 3: Cross multiply
    7,761.51x = 11,642.94 × 2,214.73
  4. Step 4: Simplify right side
    7,761.51x = 25,785,968.51
  5. Step 5: Solve for x
    x = 25,785,968.51/7,761.51
  6. Step 6: Final answer
    x = 3,322.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.