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Finding the Fourth Proportional to 57,940.10, 86,910.15 and 18,501.20

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Solution

The fourth proportional to 57,940.10, 86,910.15 and 18,501.20 is: 27,751.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,940.10 : 86,910.15 = 18,501.20 : x
  2. Step 2: Convert to fraction form
    57,940.10/86,910.15 = 18,501.20/x
  3. Step 3: Cross multiply
    57,940.10x = 86,910.15 × 18,501.20
  4. Step 4: Simplify right side
    57,940.10x = 1,607,942,067.18
  5. Step 5: Solve for x
    x = 1,607,942,067.18/57,940.10
  6. Step 6: Final answer
    x = 27,751.80

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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.