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Finding the Fourth Proportional to 13,361.91, 20,042.53 and 7,747.95

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Solution

The fourth proportional to 13,361.91, 20,042.53 and 7,747.95 is: 11,621.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.91 : 20,042.53 = 7,747.95 : x
  2. Step 2: Convert to fraction form
    13,361.91/20,042.53 = 7,747.95/x
  3. Step 3: Cross multiply
    13,361.91x = 20,042.53 × 7,747.95
  4. Step 4: Simplify right side
    13,361.91x = 155,288,520.31
  5. Step 5: Solve for x
    x = 155,288,520.31/13,361.91
  6. Step 6: Final answer
    x = 11,621.74

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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.