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Finding the Fourth Proportional to 13,827.21, 20,761.58 and 7,910.78

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Solution

The fourth proportional to 13,827.21, 20,761.58 and 7,910.78 is: 11,878.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,827.21 : 20,761.58 = 7,910.78 : x
  2. Step 2: Convert to fraction form
    13,827.21/20,761.58 = 7,910.78/x
  3. Step 3: Cross multiply
    13,827.21x = 20,761.58 × 7,910.78
  4. Step 4: Simplify right side
    13,827.21x = 164,240,188.02
  5. Step 5: Solve for x
    x = 164,240,188.02/13,827.21
  6. Step 6: Final answer
    x = 11,878.04

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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.