Home / 20,420.10-28,181.82-11,468.39

Finding the Fourth Proportional to 20,420.10, 28,181.82 and 11,468.39

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Solution

The fourth proportional to 20,420.10, 28,181.82 and 11,468.39 is: 15,827.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.10 : 28,181.82 = 11,468.39 : x
  2. Step 2: Convert to fraction form
    20,420.10/28,181.82 = 11,468.39/x
  3. Step 3: Cross multiply
    20,420.10x = 28,181.82 × 11,468.39
  4. Step 4: Simplify right side
    20,420.10x = 323,200,004.77
  5. Step 5: Solve for x
    x = 323,200,004.77/20,420.10
  6. Step 6: Final answer
    x = 15,827.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.