Home / 39,803.92-54,930.75-21,899.68

Finding the Fourth Proportional to 39,803.92, 54,930.75 and 21,899.68

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Solution

The fourth proportional to 39,803.92, 54,930.75 and 21,899.68 is: 30,222.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,803.92 : 54,930.75 = 21,899.68 : x
  2. Step 2: Convert to fraction form
    39,803.92/54,930.75 = 21,899.68/x
  3. Step 3: Cross multiply
    39,803.92x = 54,930.75 × 21,899.68
  4. Step 4: Simplify right side
    39,803.92x = 1,202,965,847.16
  5. Step 5: Solve for x
    x = 1,202,965,847.16/39,803.92
  6. Step 6: Final answer
    x = 30,222.30

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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.