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Finding the Fourth Proportional to 57,870.92, 86,812.74 and 18,418.79

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Solution

The fourth proportional to 57,870.92, 86,812.74 and 18,418.79 is: 27,630.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,870.92 : 86,812.74 = 18,418.79 : x
  2. Step 2: Convert to fraction form
    57,870.92/86,812.74 = 18,418.79/x
  3. Step 3: Cross multiply
    57,870.92x = 86,812.74 × 18,418.79
  4. Step 4: Simplify right side
    57,870.92x = 1,598,985,627.38
  5. Step 5: Solve for x
    x = 1,598,985,627.38/57,870.92
  6. Step 6: Final answer
    x = 27,630.21

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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.