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Finding the Fourth Proportional to 28,512, 39,345.84 and 15,936.84

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Solution

The fourth proportional to 28,512, 39,345.84 and 15,936.84 is: 21,992.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512 : 39,345.84 = 15,936.84 : x
  2. Step 2: Convert to fraction form
    28,512/39,345.84 = 15,936.84/x
  3. Step 3: Cross multiply
    28,512x = 39,345.84 × 15,936.84
  4. Step 4: Simplify right side
    28,512x = 627,048,356.75
  5. Step 5: Solve for x
    x = 627,048,356.75/28,512
  6. Step 6: Final answer
    x = 21,992.44

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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.