Home / 30,135.15-41,578.27-18,806.47

Finding the Fourth Proportional to 30,135.15, 41,578.27 and 18,806.47

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Solution

The fourth proportional to 30,135.15, 41,578.27 and 18,806.47 is: 25,947.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,135.15 : 41,578.27 = 18,806.47 : x
  2. Step 2: Convert to fraction form
    30,135.15/41,578.27 = 18,806.47/x
  3. Step 3: Cross multiply
    30,135.15x = 41,578.27 × 18,806.47
  4. Step 4: Simplify right side
    30,135.15x = 781,940,336.45
  5. Step 5: Solve for x
    x = 781,940,336.45/30,135.15
  6. Step 6: Final answer
    x = 25,947.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.