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Finding the Fourth Proportional to 12,021.32, 18,009.42 and 7,076.12

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Solution

The fourth proportional to 12,021.32, 18,009.42 and 7,076.12 is: 10,600.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,021.32 : 18,009.42 = 7,076.12 : x
  2. Step 2: Convert to fraction form
    12,021.32/18,009.42 = 7,076.12/x
  3. Step 3: Cross multiply
    12,021.32x = 18,009.42 × 7,076.12
  4. Step 4: Simplify right side
    12,021.32x = 127,436,817.05
  5. Step 5: Solve for x
    x = 127,436,817.05/12,021.32
  6. Step 6: Final answer
    x = 10,600.90

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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.