Home / 18,305.28-25,260.80-9,921.60

Finding the Fourth Proportional to 18,305.28, 25,260.80 and 9,921.60

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Solution

The fourth proportional to 18,305.28, 25,260.80 and 9,921.60 is: 13,691.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,305.28 : 25,260.80 = 9,921.60 : x
  2. Step 2: Convert to fraction form
    18,305.28/25,260.80 = 9,921.60/x
  3. Step 3: Cross multiply
    18,305.28x = 25,260.80 × 9,921.60
  4. Step 4: Simplify right side
    18,305.28x = 250,627,553.28
  5. Step 5: Solve for x
    x = 250,627,553.28/18,305.28
  6. Step 6: Final answer
    x = 13,691.54

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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.