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Finding the Fourth Proportional to 8,679.33, 12,991.05 and 5,720.22

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Solution

The fourth proportional to 8,679.33, 12,991.05 and 5,720.22 is: 8,561.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.33 : 12,991.05 = 5,720.22 : x
  2. Step 2: Convert to fraction form
    8,679.33/12,991.05 = 5,720.22/x
  3. Step 3: Cross multiply
    8,679.33x = 12,991.05 × 5,720.22
  4. Step 4: Simplify right side
    8,679.33x = 74,311,664.03
  5. Step 5: Solve for x
    x = 74,311,664.03/8,679.33
  6. Step 6: Final answer
    x = 8,561.91

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1.5x scale

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.