Home / 8,502.21-12,761.40-5,221.71

Finding the Fourth Proportional to 8,502.21, 12,761.40 and 5,221.71

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Solution

The fourth proportional to 8,502.21, 12,761.40 and 5,221.71 is: 7,837.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,502.21 : 12,761.40 = 5,221.71 : x
  2. Step 2: Convert to fraction form
    8,502.21/12,761.40 = 5,221.71/x
  3. Step 3: Cross multiply
    8,502.21x = 12,761.40 × 5,221.71
  4. Step 4: Simplify right side
    8,502.21x = 66,636,329.99
  5. Step 5: Solve for x
    x = 66,636,329.99/8,502.21
  6. Step 6: Final answer
    x = 7,837.53

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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.