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Finding the Fourth Proportional to 39,274.56, 58,912.56 and 12,981.60

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Solution

The fourth proportional to 39,274.56, 58,912.56 and 12,981.60 is: 19,472.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,274.56 : 58,912.56 = 12,981.60 : x
  2. Step 2: Convert to fraction form
    39,274.56/58,912.56 = 12,981.60/x
  3. Step 3: Cross multiply
    39,274.56x = 58,912.56 × 12,981.60
  4. Step 4: Simplify right side
    39,274.56x = 764,779,288.90
  5. Step 5: Solve for x
    x = 764,779,288.90/39,274.56
  6. Step 6: Final answer
    x = 19,472.64

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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.