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Finding the Fourth Proportional to 13,967.64, 20,936.88 and 6,172.20

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Solution

The fourth proportional to 13,967.64, 20,936.88 and 6,172.20 is: 9,251.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,967.64 : 20,936.88 = 6,172.20 : x
  2. Step 2: Convert to fraction form
    13,967.64/20,936.88 = 6,172.20/x
  3. Step 3: Cross multiply
    13,967.64x = 20,936.88 × 6,172.20
  4. Step 4: Simplify right side
    13,967.64x = 129,226,610.74
  5. Step 5: Solve for x
    x = 129,226,610.74/13,967.64
  6. Step 6: Final answer
    x = 9,251.86

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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.