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Finding the Fourth Proportional to 55,998.70, 83,998.05 and 20,933.80

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Solution

The fourth proportional to 55,998.70, 83,998.05 and 20,933.80 is: 31,400.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,998.70 : 83,998.05 = 20,933.80 : x
  2. Step 2: Convert to fraction form
    55,998.70/83,998.05 = 20,933.80/x
  3. Step 3: Cross multiply
    55,998.70x = 83,998.05 × 20,933.80
  4. Step 4: Simplify right side
    55,998.70x = 1,758,398,379.09
  5. Step 5: Solve for x
    x = 1,758,398,379.09/55,998.70
  6. Step 6: Final answer
    x = 31,400.70

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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.