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Finding the Fourth Proportional to 18,808.43, 28,157.27 and 13,899.96

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Solution

The fourth proportional to 18,808.43, 28,157.27 and 13,899.96 is: 20,809.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.43 : 28,157.27 = 13,899.96 : x
  2. Step 2: Convert to fraction form
    18,808.43/28,157.27 = 13,899.96/x
  3. Step 3: Cross multiply
    18,808.43x = 28,157.27 × 13,899.96
  4. Step 4: Simplify right side
    18,808.43x = 391,384,857.21
  5. Step 5: Solve for x
    x = 391,384,857.21/18,808.43
  6. Step 6: Final answer
    x = 20,809.02

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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.