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Finding the Fourth Proportional to 8,811.87, 13,217.81 and 4,428.29

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Solution

The fourth proportional to 8,811.87, 13,217.81 and 4,428.29 is: 6,642.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.87 : 13,217.81 = 4,428.29 : x
  2. Step 2: Convert to fraction form
    8,811.87/13,217.81 = 4,428.29/x
  3. Step 3: Cross multiply
    8,811.87x = 13,217.81 × 4,428.29
  4. Step 4: Simplify right side
    8,811.87x = 58,532,207.61
  5. Step 5: Solve for x
    x = 58,532,207.61/8,811.87
  6. Step 6: Final answer
    x = 6,642.43

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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.