Home / 39,827.15-54,959.47-21,921.70

Finding the Fourth Proportional to 39,827.15, 54,959.47 and 21,921.70

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Solution

The fourth proportional to 39,827.15, 54,959.47 and 21,921.70 is: 30,250.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,827.15 : 54,959.47 = 21,921.70 : x
  2. Step 2: Convert to fraction form
    39,827.15/54,959.47 = 21,921.70/x
  3. Step 3: Cross multiply
    39,827.15x = 54,959.47 × 21,921.70
  4. Step 4: Simplify right side
    39,827.15x = 1,204,805,013.50
  5. Step 5: Solve for x
    x = 1,204,805,013.50/39,827.15
  6. Step 6: Final answer
    x = 30,250.85

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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.