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Finding the Fourth Proportional to 55,489.87, 83,243.09 and 20,426.86

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Solution

The fourth proportional to 55,489.87, 83,243.09 and 20,426.86 is: 30,643.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,489.87 : 83,243.09 = 20,426.86 : x
  2. Step 2: Convert to fraction form
    55,489.87/83,243.09 = 20,426.86/x
  3. Step 3: Cross multiply
    55,489.87x = 83,243.09 × 20,426.86
  4. Step 4: Simplify right side
    55,489.87x = 1,700,394,945.40
  5. Step 5: Solve for x
    x = 1,700,394,945.40/55,489.87
  6. Step 6: Final answer
    x = 30,643.34

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1.5x scale

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.