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Finding the Fourth Proportional to 28,976, 43,469.76 and 12,336

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Solution

The fourth proportional to 28,976, 43,469.76 and 12,336 is: 18,506.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,976 : 43,469.76 = 12,336 : x
  2. Step 2: Convert to fraction form
    28,976/43,469.76 = 12,336/x
  3. Step 3: Cross multiply
    28,976x = 43,469.76 × 12,336
  4. Step 4: Simplify right side
    28,976x = 536,242,959.36
  5. Step 5: Solve for x
    x = 536,242,959.36/28,976
  6. Step 6: Final answer
    x = 18,506.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.