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Finding the Fourth Proportional to 36,986.40, 55,436.40 and 19,447.20

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Solution

The fourth proportional to 36,986.40, 55,436.40 and 19,447.20 is: 29,148.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,986.40 : 55,436.40 = 19,447.20 : x
  2. Step 2: Convert to fraction form
    36,986.40/55,436.40 = 19,447.20/x
  3. Step 3: Cross multiply
    36,986.40x = 55,436.40 × 19,447.20
  4. Step 4: Simplify right side
    36,986.40x = 1,078,082,758.08
  5. Step 5: Solve for x
    x = 1,078,082,758.08/36,986.40
  6. Step 6: Final answer
    x = 29,148.09

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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.