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Finding the Fourth Proportional to 12,564.78, 18,847.29 and 3,330.78

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Solution

The fourth proportional to 12,564.78, 18,847.29 and 3,330.78 is: 4,996.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,564.78 : 18,847.29 = 3,330.78 : x
  2. Step 2: Convert to fraction form
    12,564.78/18,847.29 = 3,330.78/x
  3. Step 3: Cross multiply
    12,564.78x = 18,847.29 × 3,330.78
  4. Step 4: Simplify right side
    12,564.78x = 62,776,176.59
  5. Step 5: Solve for x
    x = 62,776,176.59/12,564.78
  6. Step 6: Final answer
    x = 4,996.20

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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.