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Finding the Fourth Proportional to 12,761.80, 19,141.18 and 3,402.52

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Solution

The fourth proportional to 12,761.80, 19,141.18 and 3,402.52 is: 5,103.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,761.80 : 19,141.18 = 3,402.52 : x
  2. Step 2: Convert to fraction form
    12,761.80/19,141.18 = 3,402.52/x
  3. Step 3: Cross multiply
    12,761.80x = 19,141.18 × 3,402.52
  4. Step 4: Simplify right side
    12,761.80x = 65,128,247.77
  5. Step 5: Solve for x
    x = 65,128,247.77/12,761.80
  6. Step 6: Final answer
    x = 5,103.37

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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.