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Finding the Fourth Proportional to 39,456, 59,213.16 and 18,679.50

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Solution

The fourth proportional to 39,456, 59,213.16 and 18,679.50 is: 28,033.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,456 : 59,213.16 = 18,679.50 : x
  2. Step 2: Convert to fraction form
    39,456/59,213.16 = 18,679.50/x
  3. Step 3: Cross multiply
    39,456x = 59,213.16 × 18,679.50
  4. Step 4: Simplify right side
    39,456x = 1,106,072,222.22
  5. Step 5: Solve for x
    x = 1,106,072,222.22/39,456
  6. Step 6: Final answer
    x = 28,033.06

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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.