Home / 12,120.39-18,180.93-3,355.26

Finding the Fourth Proportional to 12,120.39, 18,180.93 and 3,355.26

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Solution

The fourth proportional to 12,120.39, 18,180.93 and 3,355.26 is: 5,032.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.39 : 18,180.93 = 3,355.26 : x
  2. Step 2: Convert to fraction form
    12,120.39/18,180.93 = 3,355.26/x
  3. Step 3: Cross multiply
    12,120.39x = 18,180.93 × 3,355.26
  4. Step 4: Simplify right side
    12,120.39x = 61,001,747.19
  5. Step 5: Solve for x
    x = 61,001,747.19/12,120.39
  6. Step 6: Final answer
    x = 5,032.99

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1.5x scale

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.