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Finding the Fourth Proportional to 43,889.68, 65,841 and 12,720.88

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Solution

The fourth proportional to 43,889.68, 65,841 and 12,720.88 is: 19,083.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,889.68 : 65,841 = 12,720.88 : x
  2. Step 2: Convert to fraction form
    43,889.68/65,841 = 12,720.88/x
  3. Step 3: Cross multiply
    43,889.68x = 65,841 × 12,720.88
  4. Step 4: Simplify right side
    43,889.68x = 837,555,460.08
  5. Step 5: Solve for x
    x = 837,555,460.08/43,889.68
  6. Step 6: Final answer
    x = 19,083.20

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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.