Home / 12,120.03-18,180.05-3,800.09

Finding the Fourth Proportional to 12,120.03, 18,180.05 and 3,800.09

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Solution

The fourth proportional to 12,120.03, 18,180.05 and 3,800.09 is: 5,700.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.03 : 18,180.05 = 3,800.09 : x
  2. Step 2: Convert to fraction form
    12,120.03/18,180.05 = 3,800.09/x
  3. Step 3: Cross multiply
    12,120.03x = 18,180.05 × 3,800.09
  4. Step 4: Simplify right side
    12,120.03x = 69,085,866.90
  5. Step 5: Solve for x
    x = 69,085,866.90/12,120.03
  6. Step 6: Final answer
    x = 5,700.14

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Half scale
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Double scale
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Similar ratio
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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.