Home / 11,109.96-15,334.38-7,140.48

Finding the Fourth Proportional to 11,109.96, 15,334.38 and 7,140.48

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Solution

The fourth proportional to 11,109.96, 15,334.38 and 7,140.48 is: 9,855.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,109.96 : 15,334.38 = 7,140.48 : x
  2. Step 2: Convert to fraction form
    11,109.96/15,334.38 = 7,140.48/x
  3. Step 3: Cross multiply
    11,109.96x = 15,334.38 × 7,140.48
  4. Step 4: Simplify right side
    11,109.96x = 109,494,833.70
  5. Step 5: Solve for x
    x = 109,494,833.70/11,109.96
  6. Step 6: Final answer
    x = 9,855.56

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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.