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Finding the Fourth Proportional to 15,213.94, 20,994.84 and 8,499.34

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Solution

The fourth proportional to 15,213.94, 20,994.84 and 8,499.34 is: 11,728.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,213.94 : 20,994.84 = 8,499.34 : x
  2. Step 2: Convert to fraction form
    15,213.94/20,994.84 = 8,499.34/x
  3. Step 3: Cross multiply
    15,213.94x = 20,994.84 × 8,499.34
  4. Step 4: Simplify right side
    15,213.94x = 178,442,283.41
  5. Step 5: Solve for x
    x = 178,442,283.41/15,213.94
  6. Step 6: Final answer
    x = 11,728.87

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Double scale
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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.