Home / 21,619.20-29,836.80-13,233.60

Finding the Fourth Proportional to 21,619.20, 29,836.80 and 13,233.60

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Solution

The fourth proportional to 21,619.20, 29,836.80 and 13,233.60 is: 18,263.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.20 : 29,836.80 = 13,233.60 : x
  2. Step 2: Convert to fraction form
    21,619.20/29,836.80 = 13,233.60/x
  3. Step 3: Cross multiply
    21,619.20x = 29,836.80 × 13,233.60
  4. Step 4: Simplify right side
    21,619.20x = 394,848,276.48
  5. Step 5: Solve for x
    x = 394,848,276.48/21,619.20
  6. Step 6: Final answer
    x = 18,263.78

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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.