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Finding the Fourth Proportional to 15,211.94, 20,982.12 and 12,234.66

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Solution

The fourth proportional to 15,211.94, 20,982.12 and 12,234.66 is: 16,875.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,211.94 : 20,982.12 = 12,234.66 : x
  2. Step 2: Convert to fraction form
    15,211.94/20,982.12 = 12,234.66/x
  3. Step 3: Cross multiply
    15,211.94x = 20,982.12 × 12,234.66
  4. Step 4: Simplify right side
    15,211.94x = 256,709,104.28
  5. Step 5: Solve for x
    x = 256,709,104.28/15,211.94
  6. Step 6: Final answer
    x = 16,875.50

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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.