Home / 8,486.35-12,705.72-6,399.79

Finding the Fourth Proportional to 8,486.35, 12,705.72 and 6,399.79

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Solution

The fourth proportional to 8,486.35, 12,705.72 and 6,399.79 is: 9,581.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.35 : 12,705.72 = 6,399.79 : x
  2. Step 2: Convert to fraction form
    8,486.35/12,705.72 = 6,399.79/x
  3. Step 3: Cross multiply
    8,486.35x = 12,705.72 × 6,399.79
  4. Step 4: Simplify right side
    8,486.35x = 81,313,876.27
  5. Step 5: Solve for x
    x = 81,313,876.27/8,486.35
  6. Step 6: Final answer
    x = 9,581.73

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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.