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Finding the Fourth Proportional to 17,112.60, 25,668.90 and 5,425.80

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Solution

The fourth proportional to 17,112.60, 25,668.90 and 5,425.80 is: 8,138.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,112.60 : 25,668.90 = 5,425.80 : x
  2. Step 2: Convert to fraction form
    17,112.60/25,668.90 = 5,425.80/x
  3. Step 3: Cross multiply
    17,112.60x = 25,668.90 × 5,425.80
  4. Step 4: Simplify right side
    17,112.60x = 139,274,317.62
  5. Step 5: Solve for x
    x = 139,274,317.62/17,112.60
  6. Step 6: Final answer
    x = 8,138.70

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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.