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Finding the Fourth Proportional to 15,767.60, 21,759.74 and 8,694.47

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Solution

The fourth proportional to 15,767.60, 21,759.74 and 8,694.47 is: 11,998.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,767.60 : 21,759.74 = 8,694.47 : x
  2. Step 2: Convert to fraction form
    15,767.60/21,759.74 = 8,694.47/x
  3. Step 3: Cross multiply
    15,767.60x = 21,759.74 × 8,694.47
  4. Step 4: Simplify right side
    15,767.60x = 189,189,450.17
  5. Step 5: Solve for x
    x = 189,189,450.17/15,767.60
  6. Step 6: Final answer
    x = 11,998.62

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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.