Home / 39,696.72-54,778.02-21,791.70

Finding the Fourth Proportional to 39,696.72, 54,778.02 and 21,791.70

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Solution

The fourth proportional to 39,696.72, 54,778.02 and 21,791.70 is: 30,070.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,696.72 : 54,778.02 = 21,791.70 : x
  2. Step 2: Convert to fraction form
    39,696.72/54,778.02 = 21,791.70/x
  3. Step 3: Cross multiply
    39,696.72x = 54,778.02 × 21,791.70
  4. Step 4: Simplify right side
    39,696.72x = 1,193,706,178.43
  5. Step 5: Solve for x
    x = 1,193,706,178.43/39,696.72
  6. Step 6: Final answer
    x = 30,070.65

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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.