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Finding the Fourth Proportional to 33,317.40, 45,978 and 19,169.28

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Solution

The fourth proportional to 33,317.40, 45,978 and 19,169.28 is: 26,453.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,317.40 : 45,978 = 19,169.28 : x
  2. Step 2: Convert to fraction form
    33,317.40/45,978 = 19,169.28/x
  3. Step 3: Cross multiply
    33,317.40x = 45,978 × 19,169.28
  4. Step 4: Simplify right side
    33,317.40x = 881,365,155.84
  5. Step 5: Solve for x
    x = 881,365,155.84/33,317.40
  6. Step 6: Final answer
    x = 26,453.60

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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.