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Finding the Fourth Proportional to 39,370, 59,072.40 and 20,645.56

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Solution

The fourth proportional to 39,370, 59,072.40 and 20,645.56 is: 30,977.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,370 : 59,072.40 = 20,645.56 : x
  2. Step 2: Convert to fraction form
    39,370/59,072.40 = 20,645.56/x
  3. Step 3: Cross multiply
    39,370x = 59,072.40 × 20,645.56
  4. Step 4: Simplify right side
    39,370x = 1,219,582,778.54
  5. Step 5: Solve for x
    x = 1,219,582,778.54/39,370
  6. Step 6: Final answer
    x = 30,977.46

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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.