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Finding the Fourth Proportional to 13,163.84, 18,164.88 and 7,195.12

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Solution

The fourth proportional to 13,163.84, 18,164.88 and 7,195.12 is: 9,928.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,163.84 : 18,164.88 = 7,195.12 : x
  2. Step 2: Convert to fraction form
    13,163.84/18,164.88 = 7,195.12/x
  3. Step 3: Cross multiply
    13,163.84x = 18,164.88 × 7,195.12
  4. Step 4: Simplify right side
    13,163.84x = 130,698,491.39
  5. Step 5: Solve for x
    x = 130,698,491.39/13,163.84
  6. Step 6: Final answer
    x = 9,928.60

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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.