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Finding the Fourth Proportional to 8,991.06, 12,408.96 and 6,749.38

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Solution

The fourth proportional to 8,991.06, 12,408.96 and 6,749.38 is: 9,315.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.06 : 12,408.96 = 6,749.38 : x
  2. Step 2: Convert to fraction form
    8,991.06/12,408.96 = 6,749.38/x
  3. Step 3: Cross multiply
    8,991.06x = 12,408.96 × 6,749.38
  4. Step 4: Simplify right side
    8,991.06x = 83,752,786.44
  5. Step 5: Solve for x
    x = 83,752,786.44/8,991.06
  6. Step 6: Final answer
    x = 9,315.12

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1.5x scale

Why These Related Problems?

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