Home / 18,119.92-25,011.63-11,416.78

Finding the Fourth Proportional to 18,119.92, 25,011.63 and 11,416.78

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Solution

The fourth proportional to 18,119.92, 25,011.63 and 11,416.78 is: 15,759.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,119.92 : 25,011.63 = 11,416.78 : x
  2. Step 2: Convert to fraction form
    18,119.92/25,011.63 = 11,416.78/x
  3. Step 3: Cross multiply
    18,119.92x = 25,011.63 × 11,416.78
  4. Step 4: Simplify right side
    18,119.92x = 285,552,277.15
  5. Step 5: Solve for x
    x = 285,552,277.15/18,119.92
  6. Step 6: Final answer
    x = 15,759.03

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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.