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Finding the Fourth Proportional to 13,375.56, 18,459.84 and 7,786.56

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Solution

The fourth proportional to 13,375.56, 18,459.84 and 7,786.56 is: 10,746.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,375.56 : 18,459.84 = 7,786.56 : x
  2. Step 2: Convert to fraction form
    13,375.56/18,459.84 = 7,786.56/x
  3. Step 3: Cross multiply
    13,375.56x = 18,459.84 × 7,786.56
  4. Step 4: Simplify right side
    13,375.56x = 143,738,651.75
  5. Step 5: Solve for x
    x = 143,738,651.75/13,375.56
  6. Step 6: Final answer
    x = 10,746.37

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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.