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Finding the Fourth Proportional to 15,212.84, 20,991.82 and 8,496.68

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Solution

The fourth proportional to 15,212.84, 20,991.82 and 8,496.68 is: 11,724.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,212.84 : 20,991.82 = 8,496.68 : x
  2. Step 2: Convert to fraction form
    15,212.84/20,991.82 = 8,496.68/x
  3. Step 3: Cross multiply
    15,212.84x = 20,991.82 × 8,496.68
  4. Step 4: Simplify right side
    15,212.84x = 178,360,777.16
  5. Step 5: Solve for x
    x = 178,360,777.16/15,212.84
  6. Step 6: Final answer
    x = 11,724.36

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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.