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Finding the Fourth Proportional to 13,361.13, 18,436.95 and 7,391.85

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Solution

The fourth proportional to 13,361.13, 18,436.95 and 7,391.85 is: 10,199.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.13 : 18,436.95 = 7,391.85 : x
  2. Step 2: Convert to fraction form
    13,361.13/18,436.95 = 7,391.85/x
  3. Step 3: Cross multiply
    13,361.13x = 18,436.95 × 7,391.85
  4. Step 4: Simplify right side
    13,361.13x = 136,283,168.86
  5. Step 5: Solve for x
    x = 136,283,168.86/13,361.13
  6. Step 6: Final answer
    x = 10,199.97

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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.