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Finding the Fourth Proportional to 15,217.70, 20,998.10 and 8,503.61

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Solution

The fourth proportional to 15,217.70, 20,998.10 and 8,503.61 is: 11,733.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,217.70 : 20,998.10 = 8,503.61 : x
  2. Step 2: Convert to fraction form
    15,217.70/20,998.10 = 8,503.61/x
  3. Step 3: Cross multiply
    15,217.70x = 20,998.10 × 8,503.61
  4. Step 4: Simplify right side
    15,217.70x = 178,559,505.63
  5. Step 5: Solve for x
    x = 178,559,505.63/15,217.70
  6. Step 6: Final answer
    x = 11,733.68

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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.