Home / 18,305.40-25,261.44-9,921.90

Finding the Fourth Proportional to 18,305.40, 25,261.44 and 9,921.90

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Solution

The fourth proportional to 18,305.40, 25,261.44 and 9,921.90 is: 13,692.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,305.40 : 25,261.44 = 9,921.90 : x
  2. Step 2: Convert to fraction form
    18,305.40/25,261.44 = 9,921.90/x
  3. Step 3: Cross multiply
    18,305.40x = 25,261.44 × 9,921.90
  4. Step 4: Simplify right side
    18,305.40x = 250,641,481.54
  5. Step 5: Solve for x
    x = 250,641,481.54/18,305.40
  6. Step 6: Final answer
    x = 13,692.22

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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.