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Finding the Fourth Proportional to 8,181.72, 11,290.90 and 4,455.72

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Solution

The fourth proportional to 8,181.72, 11,290.90 and 4,455.72 is: 6,148.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,181.72 : 11,290.90 = 4,455.72 : x
  2. Step 2: Convert to fraction form
    8,181.72/11,290.90 = 4,455.72/x
  3. Step 3: Cross multiply
    8,181.72x = 11,290.90 × 4,455.72
  4. Step 4: Simplify right side
    8,181.72x = 50,309,088.95
  5. Step 5: Solve for x
    x = 50,309,088.95/8,181.72
  6. Step 6: Final answer
    x = 6,148.96

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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.