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Finding the Fourth Proportional to 8,438.99, 12,657.33 and 2,199.42

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Solution

The fourth proportional to 8,438.99, 12,657.33 and 2,199.42 is: 3,298.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.99 : 12,657.33 = 2,199.42 : x
  2. Step 2: Convert to fraction form
    8,438.99/12,657.33 = 2,199.42/x
  3. Step 3: Cross multiply
    8,438.99x = 12,657.33 × 2,199.42
  4. Step 4: Simplify right side
    8,438.99x = 27,838,784.75
  5. Step 5: Solve for x
    x = 27,838,784.75/8,438.99
  6. Step 6: Final answer
    x = 3,298.83

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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.