Home / 8,418.98-11,611.37-7,408.51

Finding the Fourth Proportional to 8,418.98, 11,611.37 and 7,408.51

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Solution

The fourth proportional to 8,418.98, 11,611.37 and 7,408.51 is: 10,217.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418.98 : 11,611.37 = 7,408.51 : x
  2. Step 2: Convert to fraction form
    8,418.98/11,611.37 = 7,408.51/x
  3. Step 3: Cross multiply
    8,418.98x = 11,611.37 × 7,408.51
  4. Step 4: Simplify right side
    8,418.98x = 86,022,892.70
  5. Step 5: Solve for x
    x = 86,022,892.70/8,418.98
  6. Step 6: Final answer
    x = 10,217.73

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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.