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Finding the Fourth Proportional to 33,319.20, 49,978.80 and 8,695.20

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Solution

The fourth proportional to 33,319.20, 49,978.80 and 8,695.20 is: 13,042.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,319.20 : 49,978.80 = 8,695.20 : x
  2. Step 2: Convert to fraction form
    33,319.20/49,978.80 = 8,695.20/x
  3. Step 3: Cross multiply
    33,319.20x = 49,978.80 × 8,695.20
  4. Step 4: Simplify right side
    33,319.20x = 434,575,661.76
  5. Step 5: Solve for x
    x = 434,575,661.76/33,319.20
  6. Step 6: Final answer
    x = 13,042.80

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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.