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Finding the Fourth Proportional to 8,918.87, 13,369.19 and 6,447.56

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Solution

The fourth proportional to 8,918.87, 13,369.19 and 6,447.56 is: 9,664.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.87 : 13,369.19 = 6,447.56 : x
  2. Step 2: Convert to fraction form
    8,918.87/13,369.19 = 6,447.56/x
  3. Step 3: Cross multiply
    8,918.87x = 13,369.19 × 6,447.56
  4. Step 4: Simplify right side
    8,918.87x = 86,198,555.59
  5. Step 5: Solve for x
    x = 86,198,555.59/8,918.87
  6. Step 6: Final answer
    x = 9,664.74

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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.