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Finding the Fourth Proportional to 8,704.92, 12,009.84 and 5,720.52

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Solution

The fourth proportional to 8,704.92, 12,009.84 and 5,720.52 is: 7,892.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,704.92 : 12,009.84 = 5,720.52 : x
  2. Step 2: Convert to fraction form
    8,704.92/12,009.84 = 5,720.52/x
  3. Step 3: Cross multiply
    8,704.92x = 12,009.84 × 5,720.52
  4. Step 4: Simplify right side
    8,704.92x = 68,702,529.92
  5. Step 5: Solve for x
    x = 68,702,529.92/8,704.92
  6. Step 6: Final answer
    x = 7,892.38

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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.