Home / 39,825.79-54,959.61-21,920.67

Finding the Fourth Proportional to 39,825.79, 54,959.61 and 21,920.67

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Solution

The fourth proportional to 39,825.79, 54,959.61 and 21,920.67 is: 30,250.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,825.79 : 54,959.61 = 21,920.67 : x
  2. Step 2: Convert to fraction form
    39,825.79/54,959.61 = 21,920.67/x
  3. Step 3: Cross multiply
    39,825.79x = 54,959.61 × 21,920.67
  4. Step 4: Simplify right side
    39,825.79x = 1,204,751,474.14
  5. Step 5: Solve for x
    x = 1,204,751,474.14/39,825.79
  6. Step 6: Final answer
    x = 30,250.54

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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.