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Finding the Fourth Proportional to 11,513.90, 17,121.20 and 11,162.90

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Solution

The fourth proportional to 11,513.90, 17,121.20 and 11,162.90 is: 16,599.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,513.90 : 17,121.20 = 11,162.90 : x
  2. Step 2: Convert to fraction form
    11,513.90/17,121.20 = 11,162.90/x
  3. Step 3: Cross multiply
    11,513.90x = 17,121.20 × 11,162.90
  4. Step 4: Simplify right side
    11,513.90x = 191,122,243.48
  5. Step 5: Solve for x
    x = 191,122,243.48/11,513.90
  6. Step 6: Final answer
    x = 16,599.26

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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.