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Finding the Fourth Proportional to 8,991.65, 12,408.49 and 5,013.01

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Solution

The fourth proportional to 8,991.65, 12,408.49 and 5,013.01 is: 6,917.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.65 : 12,408.49 = 5,013.01 : x
  2. Step 2: Convert to fraction form
    8,991.65/12,408.49 = 5,013.01/x
  3. Step 3: Cross multiply
    8,991.65x = 12,408.49 × 5,013.01
  4. Step 4: Simplify right side
    8,991.65x = 62,203,941.13
  5. Step 5: Solve for x
    x = 62,203,941.13/8,991.65
  6. Step 6: Final answer
    x = 6,917.97

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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.