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Finding the Fourth Proportional to 28,939.70, 43,377.15 and 14,894.30

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Solution

The fourth proportional to 28,939.70, 43,377.15 and 14,894.30 is: 22,324.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,939.70 : 43,377.15 = 14,894.30 : x
  2. Step 2: Convert to fraction form
    28,939.70/43,377.15 = 14,894.30/x
  3. Step 3: Cross multiply
    28,939.70x = 43,377.15 × 14,894.30
  4. Step 4: Simplify right side
    28,939.70x = 646,072,285.25
  5. Step 5: Solve for x
    x = 646,072,285.25/28,939.70
  6. Step 6: Final answer
    x = 22,324.77

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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.