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Finding the Fourth Proportional to 57,553.50, 86,369.40 and 20,617.50

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Solution

The fourth proportional to 57,553.50, 86,369.40 and 20,617.50 is: 30,940.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,553.50 : 86,369.40 = 20,617.50 : x
  2. Step 2: Convert to fraction form
    57,553.50/86,369.40 = 20,617.50/x
  3. Step 3: Cross multiply
    57,553.50x = 86,369.40 × 20,617.50
  4. Step 4: Simplify right side
    57,553.50x = 1,780,721,104.50
  5. Step 5: Solve for x
    x = 1,780,721,104.50/57,553.50
  6. Step 6: Final answer
    x = 30,940.27

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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.