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Finding the Fourth Proportional to 15,119.36, 20,859.08 and 11,150

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Solution

The fourth proportional to 15,119.36, 20,859.08 and 11,150 is: 15,382.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,119.36 : 20,859.08 = 11,150 : x
  2. Step 2: Convert to fraction form
    15,119.36/20,859.08 = 11,150/x
  3. Step 3: Cross multiply
    15,119.36x = 20,859.08 × 11,150
  4. Step 4: Simplify right side
    15,119.36x = 232,578,742.00
  5. Step 5: Solve for x
    x = 232,578,742.00/15,119.36
  6. Step 6: Final answer
    x = 15,382.84

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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.