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Finding the Fourth Proportional to 18,997.56, 28,471.56 and 10,222.16

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Solution

The fourth proportional to 18,997.56, 28,471.56 and 10,222.16 is: 15,319.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,997.56 : 28,471.56 = 10,222.16 : x
  2. Step 2: Convert to fraction form
    18,997.56/28,471.56 = 10,222.16/x
  3. Step 3: Cross multiply
    18,997.56x = 28,471.56 × 10,222.16
  4. Step 4: Simplify right side
    18,997.56x = 291,040,699.41
  5. Step 5: Solve for x
    x = 291,040,699.41/18,997.56
  6. Step 6: Final answer
    x = 15,319.90

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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.