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Finding the Fourth Proportional to 18,702.25, 28,090.74 and 11,694.73

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Solution

The fourth proportional to 18,702.25, 28,090.74 and 11,694.73 is: 17,565.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.25 : 28,090.74 = 11,694.73 : x
  2. Step 2: Convert to fraction form
    18,702.25/28,090.74 = 11,694.73/x
  3. Step 3: Cross multiply
    18,702.25x = 28,090.74 × 11,694.73
  4. Step 4: Simplify right side
    18,702.25x = 328,513,619.80
  5. Step 5: Solve for x
    x = 328,513,619.80/18,702.25
  6. Step 6: Final answer
    x = 17,565.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.