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Finding the Fourth Proportional to 13,699.52, 20,549.22 and 3,311.26

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Solution

The fourth proportional to 13,699.52, 20,549.22 and 3,311.26 is: 4,966.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,699.52 : 20,549.22 = 3,311.26 : x
  2. Step 2: Convert to fraction form
    13,699.52/20,549.22 = 3,311.26/x
  3. Step 3: Cross multiply
    13,699.52x = 20,549.22 × 3,311.26
  4. Step 4: Simplify right side
    13,699.52x = 68,043,810.22
  5. Step 5: Solve for x
    x = 68,043,810.22/13,699.52
  6. Step 6: Final answer
    x = 4,966.88

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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.