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Finding the Fourth Proportional to 15,207.71, 20,986.43 and 8,493.46

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Solution

The fourth proportional to 15,207.71, 20,986.43 and 8,493.46 is: 11,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,207.71 : 20,986.43 = 8,493.46 : x
  2. Step 2: Convert to fraction form
    15,207.71/20,986.43 = 8,493.46/x
  3. Step 3: Cross multiply
    15,207.71x = 20,986.43 × 8,493.46
  4. Step 4: Simplify right side
    15,207.71x = 178,247,298.82
  5. Step 5: Solve for x
    x = 178,247,298.82/15,207.71
  6. Step 6: Final answer
    x = 11,720.85

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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.