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Finding the Fourth Proportional to 43,638.51, 65,464.02 and 16,979.34

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Solution

The fourth proportional to 43,638.51, 65,464.02 and 16,979.34 is: 25,471.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,638.51 : 65,464.02 = 16,979.34 : x
  2. Step 2: Convert to fraction form
    43,638.51/65,464.02 = 16,979.34/x
  3. Step 3: Cross multiply
    43,638.51x = 65,464.02 × 16,979.34
  4. Step 4: Simplify right side
    43,638.51x = 1,111,535,853.35
  5. Step 5: Solve for x
    x = 1,111,535,853.35/43,638.51
  6. Step 6: Final answer
    x = 25,471.44

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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.