Home / 10,255.70-15,383.55-8,408.90

Finding the Fourth Proportional to 10,255.70, 15,383.55 and 8,408.90

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Solution

The fourth proportional to 10,255.70, 15,383.55 and 8,408.90 is: 12,613.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,255.70 : 15,383.55 = 8,408.90 : x
  2. Step 2: Convert to fraction form
    10,255.70/15,383.55 = 8,408.90/x
  3. Step 3: Cross multiply
    10,255.70x = 15,383.55 × 8,408.90
  4. Step 4: Simplify right side
    10,255.70x = 129,358,733.60
  5. Step 5: Solve for x
    x = 129,358,733.60/10,255.70
  6. Step 6: Final answer
    x = 12,613.35

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Similar ratio
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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.