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Finding the Fourth Proportional to 13,872.94, 20,809.44 and 4,638.94

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Solution

The fourth proportional to 13,872.94, 20,809.44 and 4,638.94 is: 6,958.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,872.94 : 20,809.44 = 4,638.94 : x
  2. Step 2: Convert to fraction form
    13,872.94/20,809.44 = 4,638.94/x
  3. Step 3: Cross multiply
    13,872.94x = 20,809.44 × 4,638.94
  4. Step 4: Simplify right side
    13,872.94x = 96,533,691.57
  5. Step 5: Solve for x
    x = 96,533,691.57/13,872.94
  6. Step 6: Final answer
    x = 6,958.42

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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.