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Finding the Fourth Proportional to 12,679.52, 19,021.37 and 7,168.28

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Solution

The fourth proportional to 12,679.52, 19,021.37 and 7,168.28 is: 10,753.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.52 : 19,021.37 = 7,168.28 : x
  2. Step 2: Convert to fraction form
    12,679.52/19,021.37 = 7,168.28/x
  3. Step 3: Cross multiply
    12,679.52x = 19,021.37 × 7,168.28
  4. Step 4: Simplify right side
    12,679.52x = 136,350,375.20
  5. Step 5: Solve for x
    x = 136,350,375.20/12,679.52
  6. Step 6: Final answer
    x = 10,753.60

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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.