Home / 11,101.55-15,326.97-7,129.66

Finding the Fourth Proportional to 11,101.55, 15,326.97 and 7,129.66

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Solution

The fourth proportional to 11,101.55, 15,326.97 and 7,129.66 is: 9,843.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,101.55 : 15,326.97 = 7,129.66 : x
  2. Step 2: Convert to fraction form
    11,101.55/15,326.97 = 7,129.66/x
  3. Step 3: Cross multiply
    11,101.55x = 15,326.97 × 7,129.66
  4. Step 4: Simplify right side
    11,101.55x = 109,276,104.09
  5. Step 5: Solve for x
    x = 109,276,104.09/11,101.55
  6. Step 6: Final answer
    x = 9,843.32

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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.