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Finding the Fourth Proportional to 19,149.31, 28,729.02 and 8,758.63

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Solution

The fourth proportional to 19,149.31, 28,729.02 and 8,758.63 is: 13,140.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,149.31 : 28,729.02 = 8,758.63 : x
  2. Step 2: Convert to fraction form
    19,149.31/28,729.02 = 8,758.63/x
  3. Step 3: Cross multiply
    19,149.31x = 28,729.02 × 8,758.63
  4. Step 4: Simplify right side
    19,149.31x = 251,626,712.80
  5. Step 5: Solve for x
    x = 251,626,712.80/19,149.31
  6. Step 6: Final answer
    x = 13,140.25

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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.