Home / 12,954.12-19,431.18-3,720.12

Finding the Fourth Proportional to 12,954.12, 19,431.18 and 3,720.12

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Solution

The fourth proportional to 12,954.12, 19,431.18 and 3,720.12 is: 5,580.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,954.12 : 19,431.18 = 3,720.12 : x
  2. Step 2: Convert to fraction form
    12,954.12/19,431.18 = 3,720.12/x
  3. Step 3: Cross multiply
    12,954.12x = 19,431.18 × 3,720.12
  4. Step 4: Simplify right side
    12,954.12x = 72,286,321.34
  5. Step 5: Solve for x
    x = 72,286,321.34/12,954.12
  6. Step 6: Final answer
    x = 5,580.18

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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.