Home / 39,872.25-55,021.66-21,966.89

Finding the Fourth Proportional to 39,872.25, 55,021.66 and 21,966.89

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Solution

The fourth proportional to 39,872.25, 55,021.66 and 21,966.89 is: 30,313.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,872.25 : 55,021.66 = 21,966.89 : x
  2. Step 2: Convert to fraction form
    39,872.25/55,021.66 = 21,966.89/x
  3. Step 3: Cross multiply
    39,872.25x = 55,021.66 × 21,966.89
  4. Step 4: Simplify right side
    39,872.25x = 1,208,654,752.84
  5. Step 5: Solve for x
    x = 1,208,654,752.84/39,872.25
  6. Step 6: Final answer
    x = 30,313.19

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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.