Home / 39,863.75-55,011.71-21,958.34

Finding the Fourth Proportional to 39,863.75, 55,011.71 and 21,958.34

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Solution

The fourth proportional to 39,863.75, 55,011.71 and 21,958.34 is: 30,302.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,863.75 : 55,011.71 = 21,958.34 : x
  2. Step 2: Convert to fraction form
    39,863.75/55,011.71 = 21,958.34/x
  3. Step 3: Cross multiply
    39,863.75x = 55,011.71 × 21,958.34
  4. Step 4: Simplify right side
    39,863.75x = 1,207,965,612.00
  5. Step 5: Solve for x
    x = 1,207,965,612.00/39,863.75
  6. Step 6: Final answer
    x = 30,302.36

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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.