Home / 39,186.87-54,078.28-21,282.23

Finding the Fourth Proportional to 39,186.87, 54,078.28 and 21,282.23

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Solution

The fourth proportional to 39,186.87, 54,078.28 and 21,282.23 is: 29,369.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,186.87 : 54,078.28 = 21,282.23 : x
  2. Step 2: Convert to fraction form
    39,186.87/54,078.28 = 21,282.23/x
  3. Step 3: Cross multiply
    39,186.87x = 54,078.28 × 21,282.23
  4. Step 4: Simplify right side
    39,186.87x = 1,150,906,392.96
  5. Step 5: Solve for x
    x = 1,150,906,392.96/39,186.87
  6. Step 6: Final answer
    x = 29,369.69

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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.