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Finding the Fourth Proportional to 20,357.64, 28,092.96 and 11,861.64

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Solution

The fourth proportional to 20,357.64, 28,092.96 and 11,861.64 is: 16,368.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.64 : 28,092.96 = 11,861.64 : x
  2. Step 2: Convert to fraction form
    20,357.64/28,092.96 = 11,861.64/x
  3. Step 3: Cross multiply
    20,357.64x = 28,092.96 × 11,861.64
  4. Step 4: Simplify right side
    20,357.64x = 333,228,578.05
  5. Step 5: Solve for x
    x = 333,228,578.05/20,357.64
  6. Step 6: Final answer
    x = 16,368.72

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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.