Home / 8,239.20-11,376.72-5,408.80

Finding the Fourth Proportional to 8,239.20, 11,376.72 and 5,408.80

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Solution

The fourth proportional to 8,239.20, 11,376.72 and 5,408.80 is: 7,468.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,239.20 : 11,376.72 = 5,408.80 : x
  2. Step 2: Convert to fraction form
    8,239.20/11,376.72 = 5,408.80/x
  3. Step 3: Cross multiply
    8,239.20x = 11,376.72 × 5,408.80
  4. Step 4: Simplify right side
    8,239.20x = 61,534,403.14
  5. Step 5: Solve for x
    x = 61,534,403.14/8,239.20
  6. Step 6: Final answer
    x = 7,468.49

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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.