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Finding the Fourth Proportional to 8,625.78, 12,919.41 and 7,500.78

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Solution

The fourth proportional to 8,625.78, 12,919.41 and 7,500.78 is: 11,234.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,625.78 : 12,919.41 = 7,500.78 : x
  2. Step 2: Convert to fraction form
    8,625.78/12,919.41 = 7,500.78/x
  3. Step 3: Cross multiply
    8,625.78x = 12,919.41 × 7,500.78
  4. Step 4: Simplify right side
    8,625.78x = 96,905,652.14
  5. Step 5: Solve for x
    x = 96,905,652.14/8,625.78
  6. Step 6: Final answer
    x = 11,234.42

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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.