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Finding the Fourth Proportional to 21,168.16, 29,210.92 and 11,608

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Solution

The fourth proportional to 21,168.16, 29,210.92 and 11,608 is: 16,018.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.16 : 29,210.92 = 11,608 : x
  2. Step 2: Convert to fraction form
    21,168.16/29,210.92 = 11,608/x
  3. Step 3: Cross multiply
    21,168.16x = 29,210.92 × 11,608
  4. Step 4: Simplify right side
    21,168.16x = 339,080,359.36
  5. Step 5: Solve for x
    x = 339,080,359.36/21,168.16
  6. Step 6: Final answer
    x = 16,018.41

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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.