Home / 12,420.32-18,631.38-4,100

Finding the Fourth Proportional to 12,420.32, 18,631.38 and 4,100

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Solution

The fourth proportional to 12,420.32, 18,631.38 and 4,100 is: 6,150.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.32 : 18,631.38 = 4,100 : x
  2. Step 2: Convert to fraction form
    12,420.32/18,631.38 = 4,100/x
  3. Step 3: Cross multiply
    12,420.32x = 18,631.38 × 4,100
  4. Step 4: Simplify right side
    12,420.32x = 76,388,658
  5. Step 5: Solve for x
    x = 76,388,658/12,420.32
  6. Step 6: Final answer
    x = 6,150.30

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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.