Home / 38,890-53,665.42-21,893.37

Finding the Fourth Proportional to 38,890, 53,665.42 and 21,893.37

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Solution

The fourth proportional to 38,890, 53,665.42 and 21,893.37 is: 30,211.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,890 : 53,665.42 = 21,893.37 : x
  2. Step 2: Convert to fraction form
    38,890/53,665.42 = 21,893.37/x
  3. Step 3: Cross multiply
    38,890x = 53,665.42 × 21,893.37
  4. Step 4: Simplify right side
    38,890x = 1,174,916,627.94
  5. Step 5: Solve for x
    x = 1,174,916,627.94/38,890
  6. Step 6: Final answer
    x = 30,211.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.