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Finding the Fourth Proportional to 13,361.86, 18,439.09 and 7,393.17

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Solution

The fourth proportional to 13,361.86, 18,439.09 and 7,393.17 is: 10,202.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.86 : 18,439.09 = 7,393.17 : x
  2. Step 2: Convert to fraction form
    13,361.86/18,439.09 = 7,393.17/x
  3. Step 3: Cross multiply
    13,361.86x = 18,439.09 × 7,393.17
  4. Step 4: Simplify right side
    13,361.86x = 136,323,419.27
  5. Step 5: Solve for x
    x = 136,323,419.27/13,361.86
  6. Step 6: Final answer
    x = 10,202.43

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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.