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Finding the Fourth Proportional to 18,726.26, 28,070.96 and 7,640.73

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Solution

The fourth proportional to 18,726.26, 28,070.96 and 7,640.73 is: 11,453.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.26 : 28,070.96 = 7,640.73 : x
  2. Step 2: Convert to fraction form
    18,726.26/28,070.96 = 7,640.73/x
  3. Step 3: Cross multiply
    18,726.26x = 28,070.96 × 7,640.73
  4. Step 4: Simplify right side
    18,726.26x = 214,482,588.00
  5. Step 5: Solve for x
    x = 214,482,588.00/18,726.26
  6. Step 6: Final answer
    x = 11,453.58

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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.