Home / 12,135.87-18,203.81-3,370.78

Finding the Fourth Proportional to 12,135.87, 18,203.81 and 3,370.78

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Solution

The fourth proportional to 12,135.87, 18,203.81 and 3,370.78 is: 5,056.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.87 : 18,203.81 = 3,370.78 : x
  2. Step 2: Convert to fraction form
    12,135.87/18,203.81 = 3,370.78/x
  3. Step 3: Cross multiply
    12,135.87x = 18,203.81 × 3,370.78
  4. Step 4: Simplify right side
    12,135.87x = 61,361,038.67
  5. Step 5: Solve for x
    x = 61,361,038.67/12,135.87
  6. Step 6: Final answer
    x = 5,056.17

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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.