Home / 30,078.90-45,105.93-11,355.75

Finding the Fourth Proportional to 30,078.90, 45,105.93 and 11,355.75

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Solution

The fourth proportional to 30,078.90, 45,105.93 and 11,355.75 is: 17,028.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,078.90 : 45,105.93 = 11,355.75 : x
  2. Step 2: Convert to fraction form
    30,078.90/45,105.93 = 11,355.75/x
  3. Step 3: Cross multiply
    30,078.90x = 45,105.93 × 11,355.75
  4. Step 4: Simplify right side
    30,078.90x = 512,211,664.60
  5. Step 5: Solve for x
    x = 512,211,664.60/30,078.90
  6. Step 6: Final answer
    x = 17,028.94

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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.