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Finding the Fourth Proportional to 12,018.24, 18,036 and 7,404.48

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Solution

The fourth proportional to 12,018.24, 18,036 and 7,404.48 is: 11,112.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.24 : 18,036 = 7,404.48 : x
  2. Step 2: Convert to fraction form
    12,018.24/18,036 = 7,404.48/x
  3. Step 3: Cross multiply
    12,018.24x = 18,036 × 7,404.48
  4. Step 4: Simplify right side
    12,018.24x = 133,547,201.28
  5. Step 5: Solve for x
    x = 133,547,201.28/12,018.24
  6. Step 6: Final answer
    x = 11,112.04

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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.