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Finding the Fourth Proportional to 11,512.90, 17,119.71 and 11,161.90

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Solution

The fourth proportional to 11,512.90, 17,119.71 and 11,161.90 is: 16,597.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,512.90 : 17,119.71 = 11,161.90 : x
  2. Step 2: Convert to fraction form
    11,512.90/17,119.71 = 11,161.90/x
  3. Step 3: Cross multiply
    11,512.90x = 17,119.71 × 11,161.90
  4. Step 4: Simplify right side
    11,512.90x = 191,088,491.05
  5. Step 5: Solve for x
    x = 191,088,491.05/11,512.90
  6. Step 6: Final answer
    x = 16,597.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.