Home / 12,229.31-16,890.30-8,243.57

Finding the Fourth Proportional to 12,229.31, 16,890.30 and 8,243.57

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Solution

The fourth proportional to 12,229.31, 16,890.30 and 8,243.57 is: 11,385.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,229.31 : 16,890.30 = 8,243.57 : x
  2. Step 2: Convert to fraction form
    12,229.31/16,890.30 = 8,243.57/x
  3. Step 3: Cross multiply
    12,229.31x = 16,890.30 × 8,243.57
  4. Step 4: Simplify right side
    12,229.31x = 139,236,285.92
  5. Step 5: Solve for x
    x = 139,236,285.92/12,229.31
  6. Step 6: Final answer
    x = 11,385.46

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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.