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Finding the Fourth Proportional to 21,864.78, 32,799.60 and 8,013.78

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Solution

The fourth proportional to 21,864.78, 32,799.60 and 8,013.78 is: 12,021.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,864.78 : 32,799.60 = 8,013.78 : x
  2. Step 2: Convert to fraction form
    21,864.78/32,799.60 = 8,013.78/x
  3. Step 3: Cross multiply
    21,864.78x = 32,799.60 × 8,013.78
  4. Step 4: Simplify right side
    21,864.78x = 262,848,778.49
  5. Step 5: Solve for x
    x = 262,848,778.49/21,864.78
  6. Step 6: Final answer
    x = 12,021.56

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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.