Home / 13,211.19-18,231.39-7,161.60

Finding the Fourth Proportional to 13,211.19, 18,231.39 and 7,161.60

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Solution

The fourth proportional to 13,211.19, 18,231.39 and 7,161.60 is: 9,882.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.19 : 18,231.39 = 7,161.60 : x
  2. Step 2: Convert to fraction form
    13,211.19/18,231.39 = 7,161.60/x
  3. Step 3: Cross multiply
    13,211.19x = 18,231.39 × 7,161.60
  4. Step 4: Simplify right side
    13,211.19x = 130,565,922.62
  5. Step 5: Solve for x
    x = 130,565,922.62/13,211.19
  6. Step 6: Final answer
    x = 9,882.98

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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.