Home / 10,442.39-15,665.33-3,420.43

Finding the Fourth Proportional to 10,442.39, 15,665.33 and 3,420.43

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Solution

The fourth proportional to 10,442.39, 15,665.33 and 3,420.43 is: 5,131.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,442.39 : 15,665.33 = 3,420.43 : x
  2. Step 2: Convert to fraction form
    10,442.39/15,665.33 = 3,420.43/x
  3. Step 3: Cross multiply
    10,442.39x = 15,665.33 × 3,420.43
  4. Step 4: Simplify right side
    10,442.39x = 53,582,134.08
  5. Step 5: Solve for x
    x = 53,582,134.08/10,442.39
  6. Step 6: Final answer
    x = 5,131.22

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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.