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Finding the Fourth Proportional to 17,138.40, 25,664.40 and 11,263.20

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Solution

The fourth proportional to 17,138.40, 25,664.40 and 11,263.20 is: 16,866.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,138.40 : 25,664.40 = 11,263.20 : x
  2. Step 2: Convert to fraction form
    17,138.40/25,664.40 = 11,263.20/x
  3. Step 3: Cross multiply
    17,138.40x = 25,664.40 × 11,263.20
  4. Step 4: Simplify right side
    17,138.40x = 289,063,270.08
  5. Step 5: Solve for x
    x = 289,063,270.08/17,138.40
  6. Step 6: Final answer
    x = 16,866.41

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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.