Home / 12,155.48-18,236.31-3,390.41

Finding the Fourth Proportional to 12,155.48, 18,236.31 and 3,390.41

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Solution

The fourth proportional to 12,155.48, 18,236.31 and 3,390.41 is: 5,086.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.48 : 18,236.31 = 3,390.41 : x
  2. Step 2: Convert to fraction form
    12,155.48/18,236.31 = 3,390.41/x
  3. Step 3: Cross multiply
    12,155.48x = 18,236.31 × 3,390.41
  4. Step 4: Simplify right side
    12,155.48x = 61,828,498.08
  5. Step 5: Solve for x
    x = 61,828,498.08/12,155.48
  6. Step 6: Final answer
    x = 5,086.47

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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.