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Finding the Fourth Proportional to 9,361.11, 12,918.13 and 5,112.01

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Solution

The fourth proportional to 9,361.11, 12,918.13 and 5,112.01 is: 7,054.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,361.11 : 12,918.13 = 5,112.01 : x
  2. Step 2: Convert to fraction form
    9,361.11/12,918.13 = 5,112.01/x
  3. Step 3: Cross multiply
    9,361.11x = 12,918.13 × 5,112.01
  4. Step 4: Simplify right side
    9,361.11x = 66,037,609.74
  5. Step 5: Solve for x
    x = 66,037,609.74/9,361.11
  6. Step 6: Final answer
    x = 7,054.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.