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Finding the Fourth Proportional to 12,422.63, 17,149.52 and 7,889.87

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Solution

The fourth proportional to 12,422.63, 17,149.52 and 7,889.87 is: 10,892.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,422.63 : 17,149.52 = 7,889.87 : x
  2. Step 2: Convert to fraction form
    12,422.63/17,149.52 = 7,889.87/x
  3. Step 3: Cross multiply
    12,422.63x = 17,149.52 × 7,889.87
  4. Step 4: Simplify right side
    12,422.63x = 135,307,545.96
  5. Step 5: Solve for x
    x = 135,307,545.96/12,422.63
  6. Step 6: Final answer
    x = 10,892.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.