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Finding the Fourth Proportional to 21,606.64, 29,817.15 and 11,670.64

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Solution

The fourth proportional to 21,606.64, 29,817.15 and 11,670.64 is: 16,105.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,606.64 : 29,817.15 = 11,670.64 : x
  2. Step 2: Convert to fraction form
    21,606.64/29,817.15 = 11,670.64/x
  3. Step 3: Cross multiply
    21,606.64x = 29,817.15 × 11,670.64
  4. Step 4: Simplify right side
    21,606.64x = 347,985,223.48
  5. Step 5: Solve for x
    x = 347,985,223.48/21,606.64
  6. Step 6: Final answer
    x = 16,105.48

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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.