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Finding the Fourth Proportional to 39,800.43, 54,924.84 and 21,894.98

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Solution

The fourth proportional to 39,800.43, 54,924.84 and 21,894.98 is: 30,215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,800.43 : 54,924.84 = 21,894.98 : x
  2. Step 2: Convert to fraction form
    39,800.43/54,924.84 = 21,894.98/x
  3. Step 3: Cross multiply
    39,800.43x = 54,924.84 × 21,894.98
  4. Step 4: Simplify right side
    39,800.43x = 1,202,577,998.68
  5. Step 5: Solve for x
    x = 1,202,577,998.68/39,800.43
  6. Step 6: Final answer
    x = 30,215.20

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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.