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Finding the Fourth Proportional to 18,439.56, 27,656.24 and 7,911.24

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Solution

The fourth proportional to 18,439.56, 27,656.24 and 7,911.24 is: 11,865.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439.56 : 27,656.24 = 7,911.24 : x
  2. Step 2: Convert to fraction form
    18,439.56/27,656.24 = 7,911.24/x
  3. Step 3: Cross multiply
    18,439.56x = 27,656.24 × 7,911.24
  4. Step 4: Simplify right side
    18,439.56x = 218,795,152.14
  5. Step 5: Solve for x
    x = 218,795,152.14/18,439.56
  6. Step 6: Final answer
    x = 11,865.53

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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.