Home / 39,425.99-54,407.43-21,520.80

Finding the Fourth Proportional to 39,425.99, 54,407.43 and 21,520.80

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Solution

The fourth proportional to 39,425.99, 54,407.43 and 21,520.80 is: 29,698.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,425.99 : 54,407.43 = 21,520.80 : x
  2. Step 2: Convert to fraction form
    39,425.99/54,407.43 = 21,520.80/x
  3. Step 3: Cross multiply
    39,425.99x = 54,407.43 × 21,520.80
  4. Step 4: Simplify right side
    39,425.99x = 1,170,891,419.54
  5. Step 5: Solve for x
    x = 1,170,891,419.54/39,425.99
  6. Step 6: Final answer
    x = 29,698.47

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Double scale
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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.