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Finding the Fourth Proportional to 12,812.70, 19,219.05 and 11,084.70

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Solution

The fourth proportional to 12,812.70, 19,219.05 and 11,084.70 is: 16,627.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,812.70 : 19,219.05 = 11,084.70 : x
  2. Step 2: Convert to fraction form
    12,812.70/19,219.05 = 11,084.70/x
  3. Step 3: Cross multiply
    12,812.70x = 19,219.05 × 11,084.70
  4. Step 4: Simplify right side
    12,812.70x = 213,037,403.54
  5. Step 5: Solve for x
    x = 213,037,403.54/12,812.70
  6. Step 6: Final answer
    x = 16,627.05

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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.