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Finding the Fourth Proportional to 39,881.26, 55,038.59 and 21,976.26

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Solution

The fourth proportional to 39,881.26, 55,038.59 and 21,976.26 is: 30,328.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,881.26 : 55,038.59 = 21,976.26 : x
  2. Step 2: Convert to fraction form
    39,881.26/55,038.59 = 21,976.26/x
  3. Step 3: Cross multiply
    39,881.26x = 55,038.59 × 21,976.26
  4. Step 4: Simplify right side
    39,881.26x = 1,209,541,978.80
  5. Step 5: Solve for x
    x = 1,209,541,978.80/39,881.26
  6. Step 6: Final answer
    x = 30,328.58

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.