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Finding the Fourth Proportional to 29,630.44, 40,874.60 and 21,555

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Solution

The fourth proportional to 29,630.44, 40,874.60 and 21,555 is: 29,734.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,630.44 : 40,874.60 = 21,555 : x
  2. Step 2: Convert to fraction form
    29,630.44/40,874.60 = 21,555/x
  3. Step 3: Cross multiply
    29,630.44x = 40,874.60 × 21,555
  4. Step 4: Simplify right side
    29,630.44x = 881,052,003
  5. Step 5: Solve for x
    x = 881,052,003/29,630.44
  6. Step 6: Final answer
    x = 29,734.69

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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.