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Finding the Fourth Proportional to 12,845.98, 19,268.98 and 8,407.40

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Solution

The fourth proportional to 12,845.98, 19,268.98 and 8,407.40 is: 12,611.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,845.98 : 19,268.98 = 8,407.40 : x
  2. Step 2: Convert to fraction form
    12,845.98/19,268.98 = 8,407.40/x
  3. Step 3: Cross multiply
    12,845.98x = 19,268.98 × 8,407.40
  4. Step 4: Simplify right side
    12,845.98x = 162,002,022.45
  5. Step 5: Solve for x
    x = 162,002,022.45/12,845.98
  6. Step 6: Final answer
    x = 12,611.11

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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.