Home / 39,679.47-54,757.17-21,774.69

Finding the Fourth Proportional to 39,679.47, 54,757.17 and 21,774.69

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Solution

The fourth proportional to 39,679.47, 54,757.17 and 21,774.69 is: 30,048.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,679.47 : 54,757.17 = 21,774.69 : x
  2. Step 2: Convert to fraction form
    39,679.47/54,757.17 = 21,774.69/x
  3. Step 3: Cross multiply
    39,679.47x = 54,757.17 × 21,774.69
  4. Step 4: Simplify right side
    39,679.47x = 1,192,320,402.03
  5. Step 5: Solve for x
    x = 1,192,320,402.03/39,679.47
  6. Step 6: Final answer
    x = 30,048.80

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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.