Home / 12,918.87-19,378.77-3,559.62

Finding the Fourth Proportional to 12,918.87, 19,378.77 and 3,559.62

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Solution

The fourth proportional to 12,918.87, 19,378.77 and 3,559.62 is: 5,339.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.87 : 19,378.77 = 3,559.62 : x
  2. Step 2: Convert to fraction form
    12,918.87/19,378.77 = 3,559.62/x
  3. Step 3: Cross multiply
    12,918.87x = 19,378.77 × 3,559.62
  4. Step 4: Simplify right side
    12,918.87x = 68,981,057.27
  5. Step 5: Solve for x
    x = 68,981,057.27/12,918.87
  6. Step 6: Final answer
    x = 5,339.56

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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.