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Finding the Fourth Proportional to 15,207.88, 20,986.46 and 8,493.32

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Solution

The fourth proportional to 15,207.88, 20,986.46 and 8,493.32 is: 11,720.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,207.88 : 20,986.46 = 8,493.32 : x
  2. Step 2: Convert to fraction form
    15,207.88/20,986.46 = 8,493.32/x
  3. Step 3: Cross multiply
    15,207.88x = 20,986.46 × 8,493.32
  4. Step 4: Simplify right side
    15,207.88x = 178,244,720.45
  5. Step 5: Solve for x
    x = 178,244,720.45/15,207.88
  6. Step 6: Final answer
    x = 11,720.55

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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.