Home / 14,431.35-19,915.20-8,143.68

Finding the Fourth Proportional to 14,431.35, 19,915.20 and 8,143.68

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Solution

The fourth proportional to 14,431.35, 19,915.20 and 8,143.68 is: 11,238.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,431.35 : 19,915.20 = 8,143.68 : x
  2. Step 2: Convert to fraction form
    14,431.35/19,915.20 = 8,143.68/x
  3. Step 3: Cross multiply
    14,431.35x = 19,915.20 × 8,143.68
  4. Step 4: Simplify right side
    14,431.35x = 162,183,015.94
  5. Step 5: Solve for x
    x = 162,183,015.94/14,431.35
  6. Step 6: Final answer
    x = 11,238.24

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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.