Home / 39,423.78-54,403.96-21,519.09

Finding the Fourth Proportional to 39,423.78, 54,403.96 and 21,519.09

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Solution

The fourth proportional to 39,423.78, 54,403.96 and 21,519.09 is: 29,695.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,423.78 : 54,403.96 = 21,519.09 : x
  2. Step 2: Convert to fraction form
    39,423.78/54,403.96 = 21,519.09/x
  3. Step 3: Cross multiply
    39,423.78x = 54,403.96 × 21,519.09
  4. Step 4: Simplify right side
    39,423.78x = 1,170,723,711.60
  5. Step 5: Solve for x
    x = 1,170,723,711.60/39,423.78
  6. Step 6: Final answer
    x = 29,695.88

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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.