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Finding the Fourth Proportional to 8,578.20, 12,866.22 and 4,679.40

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Solution

The fourth proportional to 8,578.20, 12,866.22 and 4,679.40 is: 7,018.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,578.20 : 12,866.22 = 4,679.40 : x
  2. Step 2: Convert to fraction form
    8,578.20/12,866.22 = 4,679.40/x
  3. Step 3: Cross multiply
    8,578.20x = 12,866.22 × 4,679.40
  4. Step 4: Simplify right side
    8,578.20x = 60,206,189.87
  5. Step 5: Solve for x
    x = 60,206,189.87/8,578.20
  6. Step 6: Final answer
    x = 7,018.51

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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.