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Finding the Fourth Proportional to 8,659.46, 12,972.09 and 5,728.88

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Solution

The fourth proportional to 8,659.46, 12,972.09 and 5,728.88 is: 8,582.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.46 : 12,972.09 = 5,728.88 : x
  2. Step 2: Convert to fraction form
    8,659.46/12,972.09 = 5,728.88/x
  3. Step 3: Cross multiply
    8,659.46x = 12,972.09 × 5,728.88
  4. Step 4: Simplify right side
    8,659.46x = 74,315,546.96
  5. Step 5: Solve for x
    x = 74,315,546.96/8,659.46
  6. Step 6: Final answer
    x = 8,582.01

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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.