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Finding the Fourth Proportional to 13,222.78, 19,829.02 and 6,644.38

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Solution

The fourth proportional to 13,222.78, 19,829.02 and 6,644.38 is: 9,963.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,222.78 : 19,829.02 = 6,644.38 : x
  2. Step 2: Convert to fraction form
    13,222.78/19,829.02 = 6,644.38/x
  3. Step 3: Cross multiply
    13,222.78x = 19,829.02 × 6,644.38
  4. Step 4: Simplify right side
    13,222.78x = 131,751,411.54
  5. Step 5: Solve for x
    x = 131,751,411.54/13,222.78
  6. Step 6: Final answer
    x = 9,963.98

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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.