Home / 20,773.26-28,670.40-13,211.70

Finding the Fourth Proportional to 20,773.26, 28,670.40 and 13,211.70

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Solution

The fourth proportional to 20,773.26, 28,670.40 and 13,211.70 is: 18,234.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,773.26 : 28,670.40 = 13,211.70 : x
  2. Step 2: Convert to fraction form
    20,773.26/28,670.40 = 13,211.70/x
  3. Step 3: Cross multiply
    20,773.26x = 28,670.40 × 13,211.70
  4. Step 4: Simplify right side
    20,773.26x = 378,784,723.68
  5. Step 5: Solve for x
    x = 378,784,723.68/20,773.26
  6. Step 6: Final answer
    x = 18,234.25

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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.