Home / 20,402.62-30,603.96-12,999.64

Finding the Fourth Proportional to 20,402.62, 30,603.96 and 12,999.64

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Solution

The fourth proportional to 20,402.62, 30,603.96 and 12,999.64 is: 19,499.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.62 : 30,603.96 = 12,999.64 : x
  2. Step 2: Convert to fraction form
    20,402.62/30,603.96 = 12,999.64/x
  3. Step 3: Cross multiply
    20,402.62x = 30,603.96 × 12,999.64
  4. Step 4: Simplify right side
    20,402.62x = 397,840,462.57
  5. Step 5: Solve for x
    x = 397,840,462.57/20,402.62
  6. Step 6: Final answer
    x = 19,499.48

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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.