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Finding the Fourth Proportional to 28,411.53, 39,208.05 and 16,481.90

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Solution

The fourth proportional to 28,411.53, 39,208.05 and 16,481.90 is: 22,745.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,411.53 : 39,208.05 = 16,481.90 : x
  2. Step 2: Convert to fraction form
    28,411.53/39,208.05 = 16,481.90/x
  3. Step 3: Cross multiply
    28,411.53x = 39,208.05 × 16,481.90
  4. Step 4: Simplify right side
    28,411.53x = 646,222,963.25
  5. Step 5: Solve for x
    x = 646,222,963.25/28,411.53
  6. Step 6: Final answer
    x = 22,745.10

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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.