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Finding the Fourth Proportional to 38,561.94, 57,842.91 and 20,129.94

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Solution

The fourth proportional to 38,561.94, 57,842.91 and 20,129.94 is: 30,194.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,561.94 : 57,842.91 = 20,129.94 : x
  2. Step 2: Convert to fraction form
    38,561.94/57,842.91 = 20,129.94/x
  3. Step 3: Cross multiply
    38,561.94x = 57,842.91 × 20,129.94
  4. Step 4: Simplify right side
    38,561.94x = 1,164,374,307.73
  5. Step 5: Solve for x
    x = 1,164,374,307.73/38,561.94
  6. Step 6: Final answer
    x = 30,194.91

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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.