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Finding the Fourth Proportional to 15,203.16, 20,979.97 and 8,489.41

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Solution

The fourth proportional to 15,203.16, 20,979.97 and 8,489.41 is: 11,715.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,203.16 : 20,979.97 = 8,489.41 : x
  2. Step 2: Convert to fraction form
    15,203.16/20,979.97 = 8,489.41/x
  3. Step 3: Cross multiply
    15,203.16x = 20,979.97 × 8,489.41
  4. Step 4: Simplify right side
    15,203.16x = 178,107,493.44
  5. Step 5: Solve for x
    x = 178,107,493.44/15,203.16
  6. Step 6: Final answer
    x = 11,715.16

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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.