Home / 11,408.25-15,743.40-6,440.25

Finding the Fourth Proportional to 11,408.25, 15,743.40 and 6,440.25

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Solution

The fourth proportional to 11,408.25, 15,743.40 and 6,440.25 is: 8,887.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,408.25 : 15,743.40 = 6,440.25 : x
  2. Step 2: Convert to fraction form
    11,408.25/15,743.40 = 6,440.25/x
  3. Step 3: Cross multiply
    11,408.25x = 15,743.40 × 6,440.25
  4. Step 4: Simplify right side
    11,408.25x = 101,391,431.85
  5. Step 5: Solve for x
    x = 101,391,431.85/11,408.25
  6. Step 6: Final answer
    x = 8,887.55

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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.