Home / 11,388.96-15,726.36-7,147.08

Finding the Fourth Proportional to 11,388.96, 15,726.36 and 7,147.08

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Solution

The fourth proportional to 11,388.96, 15,726.36 and 7,147.08 is: 9,868.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,388.96 : 15,726.36 = 7,147.08 : x
  2. Step 2: Convert to fraction form
    11,388.96/15,726.36 = 7,147.08/x
  3. Step 3: Cross multiply
    11,388.96x = 15,726.36 × 7,147.08
  4. Step 4: Simplify right side
    11,388.96x = 112,397,553.03
  5. Step 5: Solve for x
    x = 112,397,553.03/11,388.96
  6. Step 6: Final answer
    x = 9,868.99

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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.