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Finding the Fourth Proportional to 18,702.60, 27,921.21 and 16,629

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Solution

The fourth proportional to 18,702.60, 27,921.21 and 16,629 is: 24,825.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.60 : 27,921.21 = 16,629 : x
  2. Step 2: Convert to fraction form
    18,702.60/27,921.21 = 16,629/x
  3. Step 3: Cross multiply
    18,702.60x = 27,921.21 × 16,629
  4. Step 4: Simplify right side
    18,702.60x = 464,301,801.09
  5. Step 5: Solve for x
    x = 464,301,801.09/18,702.60
  6. Step 6: Final answer
    x = 24,825.52

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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.