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Finding the Fourth Proportional to 13,913.60, 20,871.80 and 4,052.96

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Solution

The fourth proportional to 13,913.60, 20,871.80 and 4,052.96 is: 6,079.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,913.60 : 20,871.80 = 4,052.96 : x
  2. Step 2: Convert to fraction form
    13,913.60/20,871.80 = 4,052.96/x
  3. Step 3: Cross multiply
    13,913.60x = 20,871.80 × 4,052.96
  4. Step 4: Simplify right side
    13,913.60x = 84,592,570.53
  5. Step 5: Solve for x
    x = 84,592,570.53/13,913.60
  6. Step 6: Final answer
    x = 6,079.85

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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.