Home / 39,186.08-54,076.78-21,281.09

Finding the Fourth Proportional to 39,186.08, 54,076.78 and 21,281.09

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Solution

The fourth proportional to 39,186.08, 54,076.78 and 21,281.09 is: 29,367.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,186.08 : 54,076.78 = 21,281.09 : x
  2. Step 2: Convert to fraction form
    39,186.08/54,076.78 = 21,281.09/x
  3. Step 3: Cross multiply
    39,186.08x = 54,076.78 × 21,281.09
  4. Step 4: Simplify right side
    39,186.08x = 1,150,812,983.88
  5. Step 5: Solve for x
    x = 1,150,812,983.88/39,186.08
  6. Step 6: Final answer
    x = 29,367.90

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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.