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Finding the Fourth Proportional to 13,634.76, 18,817.68 and 8,328.48

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Solution

The fourth proportional to 13,634.76, 18,817.68 and 8,328.48 is: 11,494.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,634.76 : 18,817.68 = 8,328.48 : x
  2. Step 2: Convert to fraction form
    13,634.76/18,817.68 = 8,328.48/x
  3. Step 3: Cross multiply
    13,634.76x = 18,817.68 × 8,328.48
  4. Step 4: Simplify right side
    13,634.76x = 156,722,671.53
  5. Step 5: Solve for x
    x = 156,722,671.53/13,634.76
  6. Step 6: Final answer
    x = 11,494.35

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Half scale
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Double scale
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Similar ratio
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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.