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Finding the Fourth Proportional to 9,115.40, 13,673.10 and 9,057.80

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Solution

The fourth proportional to 9,115.40, 13,673.10 and 9,057.80 is: 13,586.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.40 : 13,673.10 = 9,057.80 : x
  2. Step 2: Convert to fraction form
    9,115.40/13,673.10 = 9,057.80/x
  3. Step 3: Cross multiply
    9,115.40x = 13,673.10 × 9,057.80
  4. Step 4: Simplify right side
    9,115.40x = 123,848,205.18
  5. Step 5: Solve for x
    x = 123,848,205.18/9,115.40
  6. Step 6: Final answer
    x = 13,586.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.