Home / 12,120.49-18,180.72-3,355.40

Finding the Fourth Proportional to 12,120.49, 18,180.72 and 3,355.40

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Solution

The fourth proportional to 12,120.49, 18,180.72 and 3,355.40 is: 5,033.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.49 : 18,180.72 = 3,355.40 : x
  2. Step 2: Convert to fraction form
    12,120.49/18,180.72 = 3,355.40/x
  3. Step 3: Cross multiply
    12,120.49x = 18,180.72 × 3,355.40
  4. Step 4: Simplify right side
    12,120.49x = 61,003,587.89
  5. Step 5: Solve for x
    x = 61,003,587.89/12,120.49
  6. Step 6: Final answer
    x = 5,033.10

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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.