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Finding the Fourth Proportional to 11,827.22, 16,309.49 and 8,640.95

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Solution

The fourth proportional to 11,827.22, 16,309.49 and 8,640.95 is: 11,915.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,827.22 : 16,309.49 = 8,640.95 : x
  2. Step 2: Convert to fraction form
    11,827.22/16,309.49 = 8,640.95/x
  3. Step 3: Cross multiply
    11,827.22x = 16,309.49 × 8,640.95
  4. Step 4: Simplify right side
    11,827.22x = 140,929,362.86
  5. Step 5: Solve for x
    x = 140,929,362.86/11,827.22
  6. Step 6: Final answer
    x = 11,915.68

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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.