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Finding the Fourth Proportional to 13,915.44, 20,872.08 and 4,555.44

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Solution

The fourth proportional to 13,915.44, 20,872.08 and 4,555.44 is: 6,832.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.44 : 20,872.08 = 4,555.44 : x
  2. Step 2: Convert to fraction form
    13,915.44/20,872.08 = 4,555.44/x
  3. Step 3: Cross multiply
    13,915.44x = 20,872.08 × 4,555.44
  4. Step 4: Simplify right side
    13,915.44x = 95,081,508.12
  5. Step 5: Solve for x
    x = 95,081,508.12/13,915.44
  6. Step 6: Final answer
    x = 6,832.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.