Home / 39,864.78-55,013.46-21,959.85

Finding the Fourth Proportional to 39,864.78, 55,013.46 and 21,959.85

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Solution

The fourth proportional to 39,864.78, 55,013.46 and 21,959.85 is: 30,304.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,864.78 : 55,013.46 = 21,959.85 : x
  2. Step 2: Convert to fraction form
    39,864.78/55,013.46 = 21,959.85/x
  3. Step 3: Cross multiply
    39,864.78x = 55,013.46 × 21,959.85
  4. Step 4: Simplify right side
    39,864.78x = 1,208,087,329.58
  5. Step 5: Solve for x
    x = 1,208,087,329.58/39,864.78
  6. Step 6: Final answer
    x = 30,304.63

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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.