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Finding the Fourth Proportional to 19,819.29, 29,729.10 and 15,860.70

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Solution

The fourth proportional to 19,819.29, 29,729.10 and 15,860.70 is: 23,791.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,819.29 : 29,729.10 = 15,860.70 : x
  2. Step 2: Convert to fraction form
    19,819.29/29,729.10 = 15,860.70/x
  3. Step 3: Cross multiply
    19,819.29x = 29,729.10 × 15,860.70
  4. Step 4: Simplify right side
    19,819.29x = 471,524,336.37
  5. Step 5: Solve for x
    x = 471,524,336.37/19,819.29
  6. Step 6: Final answer
    x = 23,791.18

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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.