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Finding the Fourth Proportional to 40,994.80, 61,511.40 and 21,295.60

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Solution

The fourth proportional to 40,994.80, 61,511.40 and 21,295.60 is: 31,953.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,994.80 : 61,511.40 = 21,295.60 : x
  2. Step 2: Convert to fraction form
    40,994.80/61,511.40 = 21,295.60/x
  3. Step 3: Cross multiply
    40,994.80x = 61,511.40 × 21,295.60
  4. Step 4: Simplify right side
    40,994.80x = 1,309,922,169.84
  5. Step 5: Solve for x
    x = 1,309,922,169.84/40,994.80
  6. Step 6: Final answer
    x = 31,953.37

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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.