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Finding the Fourth Proportional to 11,458.80, 17,188.20 and 3,138.84

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Solution

The fourth proportional to 11,458.80, 17,188.20 and 3,138.84 is: 4,708.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,458.80 : 17,188.20 = 3,138.84 : x
  2. Step 2: Convert to fraction form
    11,458.80/17,188.20 = 3,138.84/x
  3. Step 3: Cross multiply
    11,458.80x = 17,188.20 × 3,138.84
  4. Step 4: Simplify right side
    11,458.80x = 53,951,009.69
  5. Step 5: Solve for x
    x = 53,951,009.69/11,458.80
  6. Step 6: Final answer
    x = 4,708.26

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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.