Home / 15,217.72-21,000.20-8,503.44

Finding the Fourth Proportional to 15,217.72, 21,000.20 and 8,503.44

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Solution

The fourth proportional to 15,217.72, 21,000.20 and 8,503.44 is: 11,734.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,217.72 : 21,000.20 = 8,503.44 : x
  2. Step 2: Convert to fraction form
    15,217.72/21,000.20 = 8,503.44/x
  3. Step 3: Cross multiply
    15,217.72x = 21,000.20 × 8,503.44
  4. Step 4: Simplify right side
    15,217.72x = 178,573,940.69
  5. Step 5: Solve for x
    x = 178,573,940.69/15,217.72
  6. Step 6: Final answer
    x = 11,734.61

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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.