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Finding the Fourth Proportional to 28,183.76, 38,894 and 15,608.48

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Solution

The fourth proportional to 28,183.76, 38,894 and 15,608.48 is: 21,539.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,183.76 : 38,894 = 15,608.48 : x
  2. Step 2: Convert to fraction form
    28,183.76/38,894 = 15,608.48/x
  3. Step 3: Cross multiply
    28,183.76x = 38,894 × 15,608.48
  4. Step 4: Simplify right side
    28,183.76x = 607,076,221.12
  5. Step 5: Solve for x
    x = 607,076,221.12/28,183.76
  6. Step 6: Final answer
    x = 21,539.93

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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.