Home / 22,140.15-30,550.55-12,578.78

Finding the Fourth Proportional to 22,140.15, 30,550.55 and 12,578.78

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Solution

The fourth proportional to 22,140.15, 30,550.55 and 12,578.78 is: 17,357.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,140.15 : 30,550.55 = 12,578.78 : x
  2. Step 2: Convert to fraction form
    22,140.15/30,550.55 = 12,578.78/x
  3. Step 3: Cross multiply
    22,140.15x = 30,550.55 × 12,578.78
  4. Step 4: Simplify right side
    22,140.15x = 384,288,431.68
  5. Step 5: Solve for x
    x = 384,288,431.68/22,140.15
  6. Step 6: Final answer
    x = 17,357.08

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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.