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Finding the Fourth Proportional to 28,690.52, 39,593.94 and 16,115

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Solution

The fourth proportional to 28,690.52, 39,593.94 and 16,115 is: 22,239.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,690.52 : 39,593.94 = 16,115 : x
  2. Step 2: Convert to fraction form
    28,690.52/39,593.94 = 16,115/x
  3. Step 3: Cross multiply
    28,690.52x = 39,593.94 × 16,115
  4. Step 4: Simplify right side
    28,690.52x = 638,056,343.10
  5. Step 5: Solve for x
    x = 638,056,343.10/28,690.52
  6. Step 6: Final answer
    x = 22,239.27

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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.