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Finding the Fourth Proportional to 8,491.18, 12,713.15 and 4,322.21

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Solution

The fourth proportional to 8,491.18, 12,713.15 and 4,322.21 is: 6,471.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.18 : 12,713.15 = 4,322.21 : x
  2. Step 2: Convert to fraction form
    8,491.18/12,713.15 = 4,322.21/x
  3. Step 3: Cross multiply
    8,491.18x = 12,713.15 × 4,322.21
  4. Step 4: Simplify right side
    8,491.18x = 54,948,922.81
  5. Step 5: Solve for x
    x = 54,948,922.81/8,491.18
  6. Step 6: Final answer
    x = 6,471.29

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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.