Home / 12,135.48-18,203.34-3,815.31

Finding the Fourth Proportional to 12,135.48, 18,203.34 and 3,815.31

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Solution

The fourth proportional to 12,135.48, 18,203.34 and 3,815.31 is: 5,723.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.48 : 18,203.34 = 3,815.31 : x
  2. Step 2: Convert to fraction form
    12,135.48/18,203.34 = 3,815.31/x
  3. Step 3: Cross multiply
    12,135.48x = 18,203.34 × 3,815.31
  4. Step 4: Simplify right side
    12,135.48x = 69,451,385.14
  5. Step 5: Solve for x
    x = 69,451,385.14/12,135.48
  6. Step 6: Final answer
    x = 5,723.00

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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.