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Finding the Fourth Proportional to 13,078.56, 18,049.44 and 7,489.68

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Solution

The fourth proportional to 13,078.56, 18,049.44 and 7,489.68 is: 10,336.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.56 : 18,049.44 = 7,489.68 : x
  2. Step 2: Convert to fraction form
    13,078.56/18,049.44 = 7,489.68/x
  3. Step 3: Cross multiply
    13,078.56x = 18,049.44 × 7,489.68
  4. Step 4: Simplify right side
    13,078.56x = 135,184,529.78
  5. Step 5: Solve for x
    x = 135,184,529.78/13,078.56
  6. Step 6: Final answer
    x = 10,336.35

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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.