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Finding the Fourth Proportional to 7,761.30, 11,640.18 and 2,214.51

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Solution

The fourth proportional to 7,761.30, 11,640.18 and 2,214.51 is: 3,321.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,761.30 : 11,640.18 = 2,214.51 : x
  2. Step 2: Convert to fraction form
    7,761.30/11,640.18 = 2,214.51/x
  3. Step 3: Cross multiply
    7,761.30x = 11,640.18 × 2,214.51
  4. Step 4: Simplify right side
    7,761.30x = 25,777,295.01
  5. Step 5: Solve for x
    x = 25,777,295.01/7,761.30
  6. Step 6: Final answer
    x = 3,321.26

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1.5x scale

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.