Home / 12,840.92-19,261.39-3,480.94

Finding the Fourth Proportional to 12,840.92, 19,261.39 and 3,480.94

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Solution

The fourth proportional to 12,840.92, 19,261.39 and 3,480.94 is: 5,221.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.92 : 19,261.39 = 3,480.94 : x
  2. Step 2: Convert to fraction form
    12,840.92/19,261.39 = 3,480.94/x
  3. Step 3: Cross multiply
    12,840.92x = 19,261.39 × 3,480.94
  4. Step 4: Simplify right side
    12,840.92x = 67,047,782.36
  5. Step 5: Solve for x
    x = 67,047,782.36/12,840.92
  6. Step 6: Final answer
    x = 5,221.41

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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.