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Finding the Fourth Proportional to 13,072.78, 18,028.02 and 8,600.32

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Solution

The fourth proportional to 13,072.78, 18,028.02 and 8,600.32 is: 11,860.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,072.78 : 18,028.02 = 8,600.32 : x
  2. Step 2: Convert to fraction form
    13,072.78/18,028.02 = 8,600.32/x
  3. Step 3: Cross multiply
    13,072.78x = 18,028.02 × 8,600.32
  4. Step 4: Simplify right side
    13,072.78x = 155,046,740.97
  5. Step 5: Solve for x
    x = 155,046,740.97/13,072.78
  6. Step 6: Final answer
    x = 11,860.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.