Home / 18,138.48-25,022.16-11,416.56

Finding the Fourth Proportional to 18,138.48, 25,022.16 and 11,416.56

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Solution

The fourth proportional to 18,138.48, 25,022.16 and 11,416.56 is: 15,749.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.48 : 25,022.16 = 11,416.56 : x
  2. Step 2: Convert to fraction form
    18,138.48/25,022.16 = 11,416.56/x
  3. Step 3: Cross multiply
    18,138.48x = 25,022.16 × 11,416.56
  4. Step 4: Simplify right side
    18,138.48x = 285,666,990.97
  5. Step 5: Solve for x
    x = 285,666,990.97/18,138.48
  6. Step 6: Final answer
    x = 15,749.22

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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.