Home / 12,390.74-18,582.19-4,069.38

Finding the Fourth Proportional to 12,390.74, 18,582.19 and 4,069.38

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Solution

The fourth proportional to 12,390.74, 18,582.19 and 4,069.38 is: 6,102.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.74 : 18,582.19 = 4,069.38 : x
  2. Step 2: Convert to fraction form
    12,390.74/18,582.19 = 4,069.38/x
  3. Step 3: Cross multiply
    12,390.74x = 18,582.19 × 4,069.38
  4. Step 4: Simplify right side
    12,390.74x = 75,617,982.17
  5. Step 5: Solve for x
    x = 75,617,982.17/12,390.74
  6. Step 6: Final answer
    x = 6,102.78

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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.