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Finding the Fourth Proportional to 55,999.60, 84,013.80 and 20,939.44

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Solution

The fourth proportional to 55,999.60, 84,013.80 and 20,939.44 is: 31,414.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,999.60 : 84,013.80 = 20,939.44 : x
  2. Step 2: Convert to fraction form
    55,999.60/84,013.80 = 20,939.44/x
  3. Step 3: Cross multiply
    55,999.60x = 84,013.80 × 20,939.44
  4. Step 4: Simplify right side
    55,999.60x = 1,759,201,924.27
  5. Step 5: Solve for x
    x = 1,759,201,924.27/55,999.60
  6. Step 6: Final answer
    x = 31,414.54

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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.