Home / 11,138.12-15,335.54-9,456.20

Finding the Fourth Proportional to 11,138.12, 15,335.54 and 9,456.20

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Solution

The fourth proportional to 11,138.12, 15,335.54 and 9,456.20 is: 13,019.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.12 : 15,335.54 = 9,456.20 : x
  2. Step 2: Convert to fraction form
    11,138.12/15,335.54 = 9,456.20/x
  3. Step 3: Cross multiply
    11,138.12x = 15,335.54 × 9,456.20
  4. Step 4: Simplify right side
    11,138.12x = 145,015,933.35
  5. Step 5: Solve for x
    x = 145,015,933.35/11,138.12
  6. Step 6: Final answer
    x = 13,019.79

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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.