Home / 39,876.57-55,029.72-21,727.20

Finding the Fourth Proportional to 39,876.57, 55,029.72 and 21,727.20

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Solution

The fourth proportional to 39,876.57, 55,029.72 and 21,727.20 is: 29,983.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,876.57 : 55,029.72 = 21,727.20 : x
  2. Step 2: Convert to fraction form
    39,876.57/55,029.72 = 21,727.20/x
  3. Step 3: Cross multiply
    39,876.57x = 55,029.72 × 21,727.20
  4. Step 4: Simplify right side
    39,876.57x = 1,195,641,732.38
  5. Step 5: Solve for x
    x = 1,195,641,732.38/39,876.57
  6. Step 6: Final answer
    x = 29,983.57

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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.