Home / 39,723.72-54,819.36-21,820.38

Finding the Fourth Proportional to 39,723.72, 54,819.36 and 21,820.38

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Solution

The fourth proportional to 39,723.72, 54,819.36 and 21,820.38 is: 30,112.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,723.72 : 54,819.36 = 21,820.38 : x
  2. Step 2: Convert to fraction form
    39,723.72/54,819.36 = 21,820.38/x
  3. Step 3: Cross multiply
    39,723.72x = 54,819.36 × 21,820.38
  4. Step 4: Simplify right side
    39,723.72x = 1,196,179,266.56
  5. Step 5: Solve for x
    x = 1,196,179,266.56/39,723.72
  6. Step 6: Final answer
    x = 30,112.47

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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.