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Finding the Fourth Proportional to 15,662.96, 21,615.31 and 8,949.68

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Solution

The fourth proportional to 15,662.96, 21,615.31 and 8,949.68 is: 12,350.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,662.96 : 21,615.31 = 8,949.68 : x
  2. Step 2: Convert to fraction form
    15,662.96/21,615.31 = 8,949.68/x
  3. Step 3: Cross multiply
    15,662.96x = 21,615.31 × 8,949.68
  4. Step 4: Simplify right side
    15,662.96x = 193,449,954.78
  5. Step 5: Solve for x
    x = 193,449,954.78/15,662.96
  6. Step 6: Final answer
    x = 12,350.80

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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.