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Finding the Fourth Proportional to 34,640.88, 47,791.32 and 21,890.40

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Solution

The fourth proportional to 34,640.88, 47,791.32 and 21,890.40 is: 30,200.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,640.88 : 47,791.32 = 21,890.40 : x
  2. Step 2: Convert to fraction form
    34,640.88/47,791.32 = 21,890.40/x
  3. Step 3: Cross multiply
    34,640.88x = 47,791.32 × 21,890.40
  4. Step 4: Simplify right side
    34,640.88x = 1,046,171,111.33
  5. Step 5: Solve for x
    x = 1,046,171,111.33/34,640.88
  6. Step 6: Final answer
    x = 30,200.48

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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.