Home / 39,728.80-54,822.48-21,822.88

Finding the Fourth Proportional to 39,728.80, 54,822.48 and 21,822.88

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Solution

The fourth proportional to 39,728.80, 54,822.48 and 21,822.88 is: 30,113.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,728.80 : 54,822.48 = 21,822.88 : x
  2. Step 2: Convert to fraction form
    39,728.80/54,822.48 = 21,822.88/x
  3. Step 3: Cross multiply
    39,728.80x = 54,822.48 × 21,822.88
  4. Step 4: Simplify right side
    39,728.80x = 1,196,384,402.34
  5. Step 5: Solve for x
    x = 1,196,384,402.34/39,728.80
  6. Step 6: Final answer
    x = 30,113.78

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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.