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Finding the Fourth Proportional to 57,912.84, 86,850.72 and 18,460.71

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Solution

The fourth proportional to 57,912.84, 86,850.72 and 18,460.71 is: 27,685.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,912.84 : 86,850.72 = 18,460.71 : x
  2. Step 2: Convert to fraction form
    57,912.84/86,850.72 = 18,460.71/x
  3. Step 3: Cross multiply
    57,912.84x = 86,850.72 × 18,460.71
  4. Step 4: Simplify right side
    57,912.84x = 1,603,325,955.21
  5. Step 5: Solve for x
    x = 1,603,325,955.21/57,912.84
  6. Step 6: Final answer
    x = 27,685.16

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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.