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Finding the Fourth Proportional to 9,361.64, 12,918.96 and 5,112.68

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Solution

The fourth proportional to 9,361.64, 12,918.96 and 5,112.68 is: 7,055.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,361.64 : 12,918.96 = 5,112.68 : x
  2. Step 2: Convert to fraction form
    9,361.64/12,918.96 = 5,112.68/x
  3. Step 3: Cross multiply
    9,361.64x = 12,918.96 × 5,112.68
  4. Step 4: Simplify right side
    9,361.64x = 66,050,443.82
  5. Step 5: Solve for x
    x = 66,050,443.82/9,361.64
  6. Step 6: Final answer
    x = 7,055.44

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1.5x scale

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.