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Finding the Fourth Proportional to 8,190.72, 12,268.80 and 6,652.80

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Solution

The fourth proportional to 8,190.72, 12,268.80 and 6,652.80 is: 9,965.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,190.72 : 12,268.80 = 6,652.80 : x
  2. Step 2: Convert to fraction form
    8,190.72/12,268.80 = 6,652.80/x
  3. Step 3: Cross multiply
    8,190.72x = 12,268.80 × 6,652.80
  4. Step 4: Simplify right side
    8,190.72x = 81,621,872.64
  5. Step 5: Solve for x
    x = 81,621,872.64/8,190.72
  6. Step 6: Final answer
    x = 9,965.16

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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.