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Finding the Fourth Proportional to 38,986.94, 53,801.94 and 21,081.90

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Solution

The fourth proportional to 38,986.94, 53,801.94 and 21,081.90 is: 29,093.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,986.94 : 53,801.94 = 21,081.90 : x
  2. Step 2: Convert to fraction form
    38,986.94/53,801.94 = 21,081.90/x
  3. Step 3: Cross multiply
    38,986.94x = 53,801.94 × 21,081.90
  4. Step 4: Simplify right side
    38,986.94x = 1,134,247,118.89
  5. Step 5: Solve for x
    x = 1,134,247,118.89/38,986.94
  6. Step 6: Final answer
    x = 29,093.00

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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.