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Finding the Fourth Proportional to 10,190.88, 15,288.12 and 3,620.88

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Solution

The fourth proportional to 10,190.88, 15,288.12 and 3,620.88 is: 5,431.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,190.88 : 15,288.12 = 3,620.88 : x
  2. Step 2: Convert to fraction form
    10,190.88/15,288.12 = 3,620.88/x
  3. Step 3: Cross multiply
    10,190.88x = 15,288.12 × 3,620.88
  4. Step 4: Simplify right side
    10,190.88x = 55,356,447.95
  5. Step 5: Solve for x
    x = 55,356,447.95/10,190.88
  6. Step 6: Final answer
    x = 5,431.96

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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.