Home / 20,647.78-30,813.43-18,433.42

Finding the Fourth Proportional to 20,647.78, 30,813.43 and 18,433.42

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Solution

The fourth proportional to 20,647.78, 30,813.43 and 18,433.42 is: 27,508.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.78 : 30,813.43 = 18,433.42 : x
  2. Step 2: Convert to fraction form
    20,647.78/30,813.43 = 18,433.42/x
  3. Step 3: Cross multiply
    20,647.78x = 30,813.43 × 18,433.42
  4. Step 4: Simplify right side
    20,647.78x = 567,996,896.83
  5. Step 5: Solve for x
    x = 567,996,896.83/20,647.78
  6. Step 6: Final answer
    x = 27,508.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.