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Finding the Fourth Proportional to 18,735.52, 25,843.44 and 15,702.88

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Solution

The fourth proportional to 18,735.52, 25,843.44 and 15,702.88 is: 21,660.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.52 : 25,843.44 = 15,702.88 : x
  2. Step 2: Convert to fraction form
    18,735.52/25,843.44 = 15,702.88/x
  3. Step 3: Cross multiply
    18,735.52x = 25,843.44 × 15,702.88
  4. Step 4: Simplify right side
    18,735.52x = 405,816,437.11
  5. Step 5: Solve for x
    x = 405,816,437.11/18,735.52
  6. Step 6: Final answer
    x = 21,660.27

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1.5x scale

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.