Home / 12,243.20-16,871.92-8,257.39

Finding the Fourth Proportional to 12,243.20, 16,871.92 and 8,257.39

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Solution

The fourth proportional to 12,243.20, 16,871.92 and 8,257.39 is: 11,379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,243.20 : 16,871.92 = 8,257.39 : x
  2. Step 2: Convert to fraction form
    12,243.20/16,871.92 = 8,257.39/x
  3. Step 3: Cross multiply
    12,243.20x = 16,871.92 × 8,257.39
  4. Step 4: Simplify right side
    12,243.20x = 139,317,897.84
  5. Step 5: Solve for x
    x = 139,317,897.84/12,243.20
  6. Step 6: Final answer
    x = 11,379.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.