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Finding the Fourth Proportional to 34,319.80, 51,512.10 and 21,197.80

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Solution

The fourth proportional to 34,319.80, 51,512.10 and 21,197.80 is: 31,816.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,319.80 : 51,512.10 = 21,197.80 : x
  2. Step 2: Convert to fraction form
    34,319.80/51,512.10 = 21,197.80/x
  3. Step 3: Cross multiply
    34,319.80x = 51,512.10 × 21,197.80
  4. Step 4: Simplify right side
    34,319.80x = 1,091,943,193.38
  5. Step 5: Solve for x
    x = 1,091,943,193.38/34,319.80
  6. Step 6: Final answer
    x = 31,816.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.