Home / 20,403.62-30,605.46-13,000.64

Finding the Fourth Proportional to 20,403.62, 30,605.46 and 13,000.64

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Solution

The fourth proportional to 20,403.62, 30,605.46 and 13,000.64 is: 19,500.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.62 : 30,605.46 = 13,000.64 : x
  2. Step 2: Convert to fraction form
    20,403.62/30,605.46 = 13,000.64/x
  3. Step 3: Cross multiply
    20,403.62x = 30,605.46 × 13,000.64
  4. Step 4: Simplify right side
    20,403.62x = 397,890,567.49
  5. Step 5: Solve for x
    x = 397,890,567.49/20,403.62
  6. Step 6: Final answer
    x = 19,500.98

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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.