Home / 11,119.68-15,355.37-7,147.71

Finding the Fourth Proportional to 11,119.68, 15,355.37 and 7,147.71

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Solution

The fourth proportional to 11,119.68, 15,355.37 and 7,147.71 is: 9,870.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,119.68 : 15,355.37 = 7,147.71 : x
  2. Step 2: Convert to fraction form
    11,119.68/15,355.37 = 7,147.71/x
  3. Step 3: Cross multiply
    11,119.68x = 15,355.37 × 7,147.71
  4. Step 4: Simplify right side
    11,119.68x = 109,755,749.57
  5. Step 5: Solve for x
    x = 109,755,749.57/11,119.68
  6. Step 6: Final answer
    x = 9,870.41

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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.