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Finding the Fourth Proportional to 9,331.19, 12,901.44 and 8,918.09

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Solution

The fourth proportional to 9,331.19, 12,901.44 and 8,918.09 is: 12,330.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,331.19 : 12,901.44 = 8,918.09 : x
  2. Step 2: Convert to fraction form
    9,331.19/12,901.44 = 8,918.09/x
  3. Step 3: Cross multiply
    9,331.19x = 12,901.44 × 8,918.09
  4. Step 4: Simplify right side
    9,331.19x = 115,056,203.05
  5. Step 5: Solve for x
    x = 115,056,203.05/9,331.19
  6. Step 6: Final answer
    x = 12,330.28

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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.