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Finding the Fourth Proportional to 15,105.98, 20,849.21 and 9,651.54

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Solution

The fourth proportional to 15,105.98, 20,849.21 and 9,651.54 is: 13,321.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,105.98 : 20,849.21 = 9,651.54 : x
  2. Step 2: Convert to fraction form
    15,105.98/20,849.21 = 9,651.54/x
  3. Step 3: Cross multiply
    15,105.98x = 20,849.21 × 9,651.54
  4. Step 4: Simplify right side
    15,105.98x = 201,227,008.41
  5. Step 5: Solve for x
    x = 201,227,008.41/15,105.98
  6. Step 6: Final answer
    x = 13,321.02

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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.