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Finding the Fourth Proportional to 18,790.26, 28,147.09 and 8,899.55

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Solution

The fourth proportional to 18,790.26, 28,147.09 and 8,899.55 is: 13,331.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,790.26 : 28,147.09 = 8,899.55 : x
  2. Step 2: Convert to fraction form
    18,790.26/28,147.09 = 8,899.55/x
  3. Step 3: Cross multiply
    18,790.26x = 28,147.09 × 8,899.55
  4. Step 4: Simplify right side
    18,790.26x = 250,496,434.81
  5. Step 5: Solve for x
    x = 250,496,434.81/18,790.26
  6. Step 6: Final answer
    x = 13,331.19

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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.