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Finding the Fourth Proportional to 8,991.10, 13,535.20 and 8,086.90

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Solution

The fourth proportional to 8,991.10, 13,535.20 and 8,086.90 is: 12,174.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.10 : 13,535.20 = 8,086.90 : x
  2. Step 2: Convert to fraction form
    8,991.10/13,535.20 = 8,086.90/x
  3. Step 3: Cross multiply
    8,991.10x = 13,535.20 × 8,086.90
  4. Step 4: Simplify right side
    8,991.10x = 109,457,808.88
  5. Step 5: Solve for x
    x = 109,457,808.88/8,991.10
  6. Step 6: Final answer
    x = 12,174.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.