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Finding the Fourth Proportional to 28,043.52, 38,699.52 and 15,296.80

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Solution

The fourth proportional to 28,043.52, 38,699.52 and 15,296.80 is: 21,109.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,043.52 : 38,699.52 = 15,296.80 : x
  2. Step 2: Convert to fraction form
    28,043.52/38,699.52 = 15,296.80/x
  3. Step 3: Cross multiply
    28,043.52x = 38,699.52 × 15,296.80
  4. Step 4: Simplify right side
    28,043.52x = 591,978,817.54
  5. Step 5: Solve for x
    x = 591,978,817.54/28,043.52
  6. Step 6: Final answer
    x = 21,109.29

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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.