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Finding the Fourth Proportional to 10,632.78, 15,949.18 and 8,775.90

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Solution

The fourth proportional to 10,632.78, 15,949.18 and 8,775.90 is: 13,163.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,632.78 : 15,949.18 = 8,775.90 : x
  2. Step 2: Convert to fraction form
    10,632.78/15,949.18 = 8,775.90/x
  3. Step 3: Cross multiply
    10,632.78x = 15,949.18 × 8,775.90
  4. Step 4: Simplify right side
    10,632.78x = 139,968,408.76
  5. Step 5: Solve for x
    x = 139,968,408.76/10,632.78
  6. Step 6: Final answer
    x = 13,163.86

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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.