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Finding the Fourth Proportional to 17,138.76, 25,678.76 and 11,505.88

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Solution

The fourth proportional to 17,138.76, 25,678.76 and 11,505.88 is: 17,239.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,138.76 : 25,678.76 = 11,505.88 : x
  2. Step 2: Convert to fraction form
    17,138.76/25,678.76 = 11,505.88/x
  3. Step 3: Cross multiply
    17,138.76x = 25,678.76 × 11,505.88
  4. Step 4: Simplify right side
    17,138.76x = 295,456,731.11
  5. Step 5: Solve for x
    x = 295,456,731.11/17,138.76
  6. Step 6: Final answer
    x = 17,239.10

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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.