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Finding the Fourth Proportional to 8,439.93, 12,659.90 and 2,199.93

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Solution

The fourth proportional to 8,439.93, 12,659.90 and 2,199.93 is: 3,299.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.93 : 12,659.90 = 2,199.93 : x
  2. Step 2: Convert to fraction form
    8,439.93/12,659.90 = 2,199.93/x
  3. Step 3: Cross multiply
    8,439.93x = 12,659.90 × 2,199.93
  4. Step 4: Simplify right side
    8,439.93x = 27,850,893.81
  5. Step 5: Solve for x
    x = 27,850,893.81/8,439.93
  6. Step 6: Final answer
    x = 3,299.90

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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.