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Finding the Fourth Proportional to 15,376.05, 21,220.97 and 8,662.97

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Solution

The fourth proportional to 15,376.05, 21,220.97 and 8,662.97 is: 11,956.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,376.05 : 21,220.97 = 8,662.97 : x
  2. Step 2: Convert to fraction form
    15,376.05/21,220.97 = 8,662.97/x
  3. Step 3: Cross multiply
    15,376.05x = 21,220.97 × 8,662.97
  4. Step 4: Simplify right side
    15,376.05x = 183,836,636.22
  5. Step 5: Solve for x
    x = 183,836,636.22/15,376.05
  6. Step 6: Final answer
    x = 11,956.04

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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.