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Finding the Fourth Proportional to 8,991.44, 12,408.20 and 5,215.32

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Solution

The fourth proportional to 8,991.44, 12,408.20 and 5,215.32 is: 7,197.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.44 : 12,408.20 = 5,215.32 : x
  2. Step 2: Convert to fraction form
    8,991.44/12,408.20 = 5,215.32/x
  3. Step 3: Cross multiply
    8,991.44x = 12,408.20 × 5,215.32
  4. Step 4: Simplify right side
    8,991.44x = 64,712,733.62
  5. Step 5: Solve for x
    x = 64,712,733.62/8,991.44
  6. Step 6: Final answer
    x = 7,197.15

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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.