Home / 39,765.98-54,876-21,861.14

Finding the Fourth Proportional to 39,765.98, 54,876 and 21,861.14

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Solution

The fourth proportional to 39,765.98, 54,876 and 21,861.14 is: 30,167.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,765.98 : 54,876 = 21,861.14 : x
  2. Step 2: Convert to fraction form
    39,765.98/54,876 = 21,861.14/x
  3. Step 3: Cross multiply
    39,765.98x = 54,876 × 21,861.14
  4. Step 4: Simplify right side
    39,765.98x = 1,199,651,918.64
  5. Step 5: Solve for x
    x = 1,199,651,918.64/39,765.98
  6. Step 6: Final answer
    x = 30,167.79

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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.