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Finding the Fourth Proportional to 22,361.40, 30,859.92 and 13,409.28

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Solution

The fourth proportional to 22,361.40, 30,859.92 and 13,409.28 is: 18,505.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,361.40 : 30,859.92 = 13,409.28 : x
  2. Step 2: Convert to fraction form
    22,361.40/30,859.92 = 13,409.28/x
  3. Step 3: Cross multiply
    22,361.40x = 30,859.92 × 13,409.28
  4. Step 4: Simplify right side
    22,361.40x = 413,809,308.06
  5. Step 5: Solve for x
    x = 413,809,308.06/22,361.40
  6. Step 6: Final answer
    x = 18,505.52

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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.