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Finding the Fourth Proportional to 57,940.80, 86,912.82 and 20,495.58

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Solution

The fourth proportional to 57,940.80, 86,912.82 and 20,495.58 is: 30,743.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,940.80 : 86,912.82 = 20,495.58 : x
  2. Step 2: Convert to fraction form
    57,940.80/86,912.82 = 20,495.58/x
  3. Step 3: Cross multiply
    57,940.80x = 86,912.82 × 20,495.58
  4. Step 4: Simplify right side
    57,940.80x = 1,781,328,655.34
  5. Step 5: Solve for x
    x = 1,781,328,655.34/57,940.80
  6. Step 6: Final answer
    x = 30,743.94

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1.5x scale

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.