Home / 12,015.12-18,016.78-7,018.75

Finding the Fourth Proportional to 12,015.12, 18,016.78 and 7,018.75

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Solution

The fourth proportional to 12,015.12, 18,016.78 and 7,018.75 is: 10,524.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,015.12 : 18,016.78 = 7,018.75 : x
  2. Step 2: Convert to fraction form
    12,015.12/18,016.78 = 7,018.75/x
  3. Step 3: Cross multiply
    12,015.12x = 18,016.78 × 7,018.75
  4. Step 4: Simplify right side
    12,015.12x = 126,455,191.41
  5. Step 5: Solve for x
    x = 126,455,191.41/12,015.12
  6. Step 6: Final answer
    x = 10,524.67

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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.