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Finding the Fourth Proportional to 43,362.86, 65,043.26 and 19,989.30

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Solution

The fourth proportional to 43,362.86, 65,043.26 and 19,989.30 is: 29,983.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,362.86 : 65,043.26 = 19,989.30 : x
  2. Step 2: Convert to fraction form
    43,362.86/65,043.26 = 19,989.30/x
  3. Step 3: Cross multiply
    43,362.86x = 65,043.26 × 19,989.30
  4. Step 4: Simplify right side
    43,362.86x = 1,300,169,237.12
  5. Step 5: Solve for x
    x = 1,300,169,237.12/43,362.86
  6. Step 6: Final answer
    x = 29,983.48

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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.