Home / 11,112.96-15,331.20-9,427.20

Finding the Fourth Proportional to 11,112.96, 15,331.20 and 9,427.20

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Solution

The fourth proportional to 11,112.96, 15,331.20 and 9,427.20 is: 13,005.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,112.96 : 15,331.20 = 9,427.20 : x
  2. Step 2: Convert to fraction form
    11,112.96/15,331.20 = 9,427.20/x
  3. Step 3: Cross multiply
    11,112.96x = 15,331.20 × 9,427.20
  4. Step 4: Simplify right side
    11,112.96x = 144,530,288.64
  5. Step 5: Solve for x
    x = 144,530,288.64/11,112.96
  6. Step 6: Final answer
    x = 13,005.56

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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.