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Finding the Fourth Proportional to 17,663.72, 26,500.88 and 7,128.32

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Solution

The fourth proportional to 17,663.72, 26,500.88 and 7,128.32 is: 10,694.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,663.72 : 26,500.88 = 7,128.32 : x
  2. Step 2: Convert to fraction form
    17,663.72/26,500.88 = 7,128.32/x
  3. Step 3: Cross multiply
    17,663.72x = 26,500.88 × 7,128.32
  4. Step 4: Simplify right side
    17,663.72x = 188,906,752.92
  5. Step 5: Solve for x
    x = 188,906,752.92/17,663.72
  6. Step 6: Final answer
    x = 10,694.62

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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.