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Finding the Fourth Proportional to 21,663.88, 29,898.16 and 13,164.03

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Solution

The fourth proportional to 21,663.88, 29,898.16 and 13,164.03 is: 18,167.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663.88 : 29,898.16 = 13,164.03 : x
  2. Step 2: Convert to fraction form
    21,663.88/29,898.16 = 13,164.03/x
  3. Step 3: Cross multiply
    21,663.88x = 29,898.16 × 13,164.03
  4. Step 4: Simplify right side
    21,663.88x = 393,580,242.27
  5. Step 5: Solve for x
    x = 393,580,242.27/21,663.88
  6. Step 6: Final answer
    x = 18,167.58

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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.