Home / 10,481.20-15,721.80-3,905.60

Finding the Fourth Proportional to 10,481.20, 15,721.80 and 3,905.60

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Solution

The fourth proportional to 10,481.20, 15,721.80 and 3,905.60 is: 5,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,481.20 : 15,721.80 = 3,905.60 : x
  2. Step 2: Convert to fraction form
    10,481.20/15,721.80 = 3,905.60/x
  3. Step 3: Cross multiply
    10,481.20x = 15,721.80 × 3,905.60
  4. Step 4: Simplify right side
    10,481.20x = 61,403,062.08
  5. Step 5: Solve for x
    x = 61,403,062.08/10,481.20
  6. Step 6: Final answer
    x = 5,858.40

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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.