Home / 39,760.47-54,869.58-21,855.78

Finding the Fourth Proportional to 39,760.47, 54,869.58 and 21,855.78

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Solution

The fourth proportional to 39,760.47, 54,869.58 and 21,855.78 is: 30,161.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,760.47 : 54,869.58 = 21,855.78 : x
  2. Step 2: Convert to fraction form
    39,760.47/54,869.58 = 21,855.78/x
  3. Step 3: Cross multiply
    39,760.47x = 54,869.58 × 21,855.78
  4. Step 4: Simplify right side
    39,760.47x = 1,199,217,469.17
  5. Step 5: Solve for x
    x = 1,199,217,469.17/39,760.47
  6. Step 6: Final answer
    x = 30,161.05

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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.