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Finding the Fourth Proportional to 36,290.40, 54,368.40 and 20,661.60

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Solution

The fourth proportional to 36,290.40, 54,368.40 and 20,661.60 is: 30,954.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,290.40 : 54,368.40 = 20,661.60 : x
  2. Step 2: Convert to fraction form
    36,290.40/54,368.40 = 20,661.60/x
  3. Step 3: Cross multiply
    36,290.40x = 54,368.40 × 20,661.60
  4. Step 4: Simplify right side
    36,290.40x = 1,123,338,133.44
  5. Step 5: Solve for x
    x = 1,123,338,133.44/36,290.40
  6. Step 6: Final answer
    x = 30,954.14

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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.