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Finding the Fourth Proportional to 22,477.62, 31,018.92 and 12,918

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Solution

The fourth proportional to 22,477.62, 31,018.92 and 12,918 is: 17,826.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,477.62 : 31,018.92 = 12,918 : x
  2. Step 2: Convert to fraction form
    22,477.62/31,018.92 = 12,918/x
  3. Step 3: Cross multiply
    22,477.62x = 31,018.92 × 12,918
  4. Step 4: Simplify right side
    22,477.62x = 400,702,408.56
  5. Step 5: Solve for x
    x = 400,702,408.56/22,477.62
  6. Step 6: Final answer
    x = 17,826.73

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