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Finding the Fourth Proportional to 15,435.09, 21,300.40 and 8,361.54

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Solution

The fourth proportional to 15,435.09, 21,300.40 and 8,361.54 is: 11,538.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435.09 : 21,300.40 = 8,361.54 : x
  2. Step 2: Convert to fraction form
    15,435.09/21,300.40 = 8,361.54/x
  3. Step 3: Cross multiply
    15,435.09x = 21,300.40 × 8,361.54
  4. Step 4: Simplify right side
    15,435.09x = 178,104,146.62
  5. Step 5: Solve for x
    x = 178,104,146.62/15,435.09
  6. Step 6: Final answer
    x = 11,538.91

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