Home / 20,420.38-30,608.91-11,636.47

Finding the Fourth Proportional to 20,420.38, 30,608.91 and 11,636.47

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Solution

The fourth proportional to 20,420.38, 30,608.91 and 11,636.47 is: 17,442.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.38 : 30,608.91 = 11,636.47 : x
  2. Step 2: Convert to fraction form
    20,420.38/30,608.91 = 11,636.47/x
  3. Step 3: Cross multiply
    20,420.38x = 30,608.91 × 11,636.47
  4. Step 4: Simplify right side
    20,420.38x = 356,179,662.95
  5. Step 5: Solve for x
    x = 356,179,662.95/20,420.38
  6. Step 6: Final answer
    x = 17,442.36

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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.