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Finding the Fourth Proportional to 13,871.85, 20,811.02 and 4,011.32

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Solution

The fourth proportional to 13,871.85, 20,811.02 and 4,011.32 is: 6,017.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.85 : 20,811.02 = 4,011.32 : x
  2. Step 2: Convert to fraction form
    13,871.85/20,811.02 = 4,011.32/x
  3. Step 3: Cross multiply
    13,871.85x = 20,811.02 × 4,011.32
  4. Step 4: Simplify right side
    13,871.85x = 83,479,536.63
  5. Step 5: Solve for x
    x = 83,479,536.63/13,871.85
  6. Step 6: Final answer
    x = 6,017.91

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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.