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Finding the Fourth Proportional to 15,735.92, 21,715.07 and 8,662.32

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Solution

The fourth proportional to 15,735.92, 21,715.07 and 8,662.32 is: 11,953.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,735.92 : 21,715.07 = 8,662.32 : x
  2. Step 2: Convert to fraction form
    15,735.92/21,715.07 = 8,662.32/x
  3. Step 3: Cross multiply
    15,735.92x = 21,715.07 × 8,662.32
  4. Step 4: Simplify right side
    15,735.92x = 188,102,841.85
  5. Step 5: Solve for x
    x = 188,102,841.85/15,735.92
  6. Step 6: Final answer
    x = 11,953.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.