Home / 38,638.40-57,968.40-18,917.60

Finding the Fourth Proportional to 38,638.40, 57,968.40 and 18,917.60

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Solution

The fourth proportional to 38,638.40, 57,968.40 and 18,917.60 is: 28,381.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,638.40 : 57,968.40 = 18,917.60 : x
  2. Step 2: Convert to fraction form
    38,638.40/57,968.40 = 18,917.60/x
  3. Step 3: Cross multiply
    38,638.40x = 57,968.40 × 18,917.60
  4. Step 4: Simplify right side
    38,638.40x = 1,096,623,003.84
  5. Step 5: Solve for x
    x = 1,096,623,003.84/38,638.40
  6. Step 6: Final answer
    x = 28,381.69

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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.