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Finding the Fourth Proportional to 7,813.09, 11,719.03 and 2,881.81

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Solution

The fourth proportional to 7,813.09, 11,719.03 and 2,881.81 is: 4,322.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,813.09 : 11,719.03 = 2,881.81 : x
  2. Step 2: Convert to fraction form
    7,813.09/11,719.03 = 2,881.81/x
  3. Step 3: Cross multiply
    7,813.09x = 11,719.03 × 2,881.81
  4. Step 4: Simplify right side
    7,813.09x = 33,772,017.84
  5. Step 5: Solve for x
    x = 33,772,017.84/7,813.09
  6. Step 6: Final answer
    x = 4,322.49

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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.