Home / 39,678.89-54,758.45-21,774.54

Finding the Fourth Proportional to 39,678.89, 54,758.45 and 21,774.54

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Solution

The fourth proportional to 39,678.89, 54,758.45 and 21,774.54 is: 30,049.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,678.89 : 54,758.45 = 21,774.54 : x
  2. Step 2: Convert to fraction form
    39,678.89/54,758.45 = 21,774.54/x
  3. Step 3: Cross multiply
    39,678.89x = 54,758.45 × 21,774.54
  4. Step 4: Simplify right side
    39,678.89x = 1,192,339,950.99
  5. Step 5: Solve for x
    x = 1,192,339,950.99/39,678.89
  6. Step 6: Final answer
    x = 30,049.73

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1.5x scale

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.