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Finding the Fourth Proportional to 18,647.56, 25,739.12 and 11,099.24

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Solution

The fourth proportional to 18,647.56, 25,739.12 and 11,099.24 is: 15,320.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,647.56 : 25,739.12 = 11,099.24 : x
  2. Step 2: Convert to fraction form
    18,647.56/25,739.12 = 11,099.24/x
  3. Step 3: Cross multiply
    18,647.56x = 25,739.12 × 11,099.24
  4. Step 4: Simplify right side
    18,647.56x = 285,684,670.27
  5. Step 5: Solve for x
    x = 285,684,670.27/18,647.56
  6. Step 6: Final answer
    x = 15,320.22

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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.