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Finding the Fourth Proportional to 28,815, 43,229.80 and 8,038.50

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Solution

The fourth proportional to 28,815, 43,229.80 and 8,038.50 is: 12,059.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,815 : 43,229.80 = 8,038.50 : x
  2. Step 2: Convert to fraction form
    28,815/43,229.80 = 8,038.50/x
  3. Step 3: Cross multiply
    28,815x = 43,229.80 × 8,038.50
  4. Step 4: Simplify right side
    28,815x = 347,502,747.30
  5. Step 5: Solve for x
    x = 347,502,747.30/28,815
  6. Step 6: Final answer
    x = 12,059.79

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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.