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Finding the Fourth Proportional to 29,821.90, 41,110.78 and 20,841.50

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Solution

The fourth proportional to 29,821.90, 41,110.78 and 20,841.50 is: 28,730.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,821.90 : 41,110.78 = 20,841.50 : x
  2. Step 2: Convert to fraction form
    29,821.90/41,110.78 = 20,841.50/x
  3. Step 3: Cross multiply
    29,821.90x = 41,110.78 × 20,841.50
  4. Step 4: Simplify right side
    29,821.90x = 856,810,321.37
  5. Step 5: Solve for x
    x = 856,810,321.37/29,821.90
  6. Step 6: Final answer
    x = 28,730.91

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1.5x scale

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.