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Finding the Fourth Proportional to 13,914.46, 20,871.78 and 3,526.21

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Solution

The fourth proportional to 13,914.46, 20,871.78 and 3,526.21 is: 5,289.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,914.46 : 20,871.78 = 3,526.21 : x
  2. Step 2: Convert to fraction form
    13,914.46/20,871.78 = 3,526.21/x
  3. Step 3: Cross multiply
    13,914.46x = 20,871.78 × 3,526.21
  4. Step 4: Simplify right side
    13,914.46x = 73,598,279.35
  5. Step 5: Solve for x
    x = 73,598,279.35/13,914.46
  6. Step 6: Final answer
    x = 5,289.34

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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.