Home / 18,722.24-28,083.36-12,861.12

Finding the Fourth Proportional to 18,722.24, 28,083.36 and 12,861.12

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Solution

The fourth proportional to 18,722.24, 28,083.36 and 12,861.12 is: 19,291.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.24 : 28,083.36 = 12,861.12 : x
  2. Step 2: Convert to fraction form
    18,722.24/28,083.36 = 12,861.12/x
  3. Step 3: Cross multiply
    18,722.24x = 28,083.36 × 12,861.12
  4. Step 4: Simplify right side
    18,722.24x = 361,183,462.96
  5. Step 5: Solve for x
    x = 361,183,462.96/18,722.24
  6. Step 6: Final answer
    x = 19,291.68

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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.