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Finding the Fourth Proportional to 12,018.28, 18,015.26 and 5,769.16

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Solution

The fourth proportional to 12,018.28, 18,015.26 and 5,769.16 is: 8,647.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.28 : 18,015.26 = 5,769.16 : x
  2. Step 2: Convert to fraction form
    12,018.28/18,015.26 = 5,769.16/x
  3. Step 3: Cross multiply
    12,018.28x = 18,015.26 × 5,769.16
  4. Step 4: Simplify right side
    12,018.28x = 103,932,917.38
  5. Step 5: Solve for x
    x = 103,932,917.38/12,018.28
  6. Step 6: Final answer
    x = 8,647.90

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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.