Home / 26,408.10-39,618.60-8,639.79

Finding the Fourth Proportional to 26,408.10, 39,618.60 and 8,639.79

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Solution

The fourth proportional to 26,408.10, 39,618.60 and 8,639.79 is: 12,961.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,408.10 : 39,618.60 = 8,639.79 : x
  2. Step 2: Convert to fraction form
    26,408.10/39,618.60 = 8,639.79/x
  3. Step 3: Cross multiply
    26,408.10x = 39,618.60 × 8,639.79
  4. Step 4: Simplify right side
    26,408.10x = 342,296,384.09
  5. Step 5: Solve for x
    x = 342,296,384.09/26,408.10
  6. Step 6: Final answer
    x = 12,961.80

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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.