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Finding the Fourth Proportional to 17,090.60, 25,634.78 and 5,412.20

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Solution

The fourth proportional to 17,090.60, 25,634.78 and 5,412.20 is: 8,117.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,090.60 : 25,634.78 = 5,412.20 : x
  2. Step 2: Convert to fraction form
    17,090.60/25,634.78 = 5,412.20/x
  3. Step 3: Cross multiply
    17,090.60x = 25,634.78 × 5,412.20
  4. Step 4: Simplify right side
    17,090.60x = 138,740,556.32
  5. Step 5: Solve for x
    x = 138,740,556.32/17,090.60
  6. Step 6: Final answer
    x = 8,117.95

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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.