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Finding the Fourth Proportional to 13,260.81, 19,889.74 and 3,400.32

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Solution

The fourth proportional to 13,260.81, 19,889.74 and 3,400.32 is: 5,100.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,260.81 : 19,889.74 = 3,400.32 : x
  2. Step 2: Convert to fraction form
    13,260.81/19,889.74 = 3,400.32/x
  3. Step 3: Cross multiply
    13,260.81x = 19,889.74 × 3,400.32
  4. Step 4: Simplify right side
    13,260.81x = 67,631,540.43
  5. Step 5: Solve for x
    x = 67,631,540.43/13,260.81
  6. Step 6: Final answer
    x = 5,100.10

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.