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Finding the Fourth Proportional to 18,765.30, 28,147.92 and 8,899.19

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Solution

The fourth proportional to 18,765.30, 28,147.92 and 8,899.19 is: 13,348.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.30 : 28,147.92 = 8,899.19 : x
  2. Step 2: Convert to fraction form
    18,765.30/28,147.92 = 8,899.19/x
  3. Step 3: Cross multiply
    18,765.30x = 28,147.92 × 8,899.19
  4. Step 4: Simplify right side
    18,765.30x = 250,493,547.45
  5. Step 5: Solve for x
    x = 250,493,547.45/18,765.30
  6. Step 6: Final answer
    x = 13,348.76

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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.