Home / 8,179.78-12,240.39-6,430.18

Finding the Fourth Proportional to 8,179.78, 12,240.39 and 6,430.18

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Solution

The fourth proportional to 8,179.78, 12,240.39 and 6,430.18 is: 9,622.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,179.78 : 12,240.39 = 6,430.18 : x
  2. Step 2: Convert to fraction form
    8,179.78/12,240.39 = 6,430.18/x
  3. Step 3: Cross multiply
    8,179.78x = 12,240.39 × 6,430.18
  4. Step 4: Simplify right side
    8,179.78x = 78,707,910.97
  5. Step 5: Solve for x
    x = 78,707,910.97/8,179.78
  6. Step 6: Final answer
    x = 9,622.25

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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.