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Finding the Fourth Proportional to 13,321.66, 20,005.17 and 12,764.38

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Solution

The fourth proportional to 13,321.66, 20,005.17 and 12,764.38 is: 19,168.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.66 : 20,005.17 = 12,764.38 : x
  2. Step 2: Convert to fraction form
    13,321.66/20,005.17 = 12,764.38/x
  3. Step 3: Cross multiply
    13,321.66x = 20,005.17 × 12,764.38
  4. Step 4: Simplify right side
    13,321.66x = 255,353,591.84
  5. Step 5: Solve for x
    x = 255,353,591.84/13,321.66
  6. Step 6: Final answer
    x = 19,168.30

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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.