Home / 8,686.90-13,021.78-3,418.62

Finding the Fourth Proportional to 8,686.90, 13,021.78 and 3,418.62

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Solution

The fourth proportional to 8,686.90, 13,021.78 and 3,418.62 is: 5,124.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.90 : 13,021.78 = 3,418.62 : x
  2. Step 2: Convert to fraction form
    8,686.90/13,021.78 = 3,418.62/x
  3. Step 3: Cross multiply
    8,686.90x = 13,021.78 × 3,418.62
  4. Step 4: Simplify right side
    8,686.90x = 44,516,517.54
  5. Step 5: Solve for x
    x = 44,516,517.54/8,686.90
  6. Step 6: Final answer
    x = 5,124.56

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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.