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Finding the Fourth Proportional to 13,263.84, 18,309.36 and 8,229.12

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Solution

The fourth proportional to 13,263.84, 18,309.36 and 8,229.12 is: 11,359.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,263.84 : 18,309.36 = 8,229.12 : x
  2. Step 2: Convert to fraction form
    13,263.84/18,309.36 = 8,229.12/x
  3. Step 3: Cross multiply
    13,263.84x = 18,309.36 × 8,229.12
  4. Step 4: Simplify right side
    13,263.84x = 150,669,920.56
  5. Step 5: Solve for x
    x = 150,669,920.56/13,263.84
  6. Step 6: Final answer
    x = 11,359.45

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.