Home / 39,729.40-54,826.64-21,825.56

Finding the Fourth Proportional to 39,729.40, 54,826.64 and 21,825.56

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Solution

The fourth proportional to 39,729.40, 54,826.64 and 21,825.56 is: 30,119.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,729.40 : 54,826.64 = 21,825.56 : x
  2. Step 2: Convert to fraction form
    39,729.40/54,826.64 = 21,825.56/x
  3. Step 3: Cross multiply
    39,729.40x = 54,826.64 × 21,825.56
  4. Step 4: Simplify right side
    39,729.40x = 1,196,622,120.92
  5. Step 5: Solve for x
    x = 1,196,622,120.92/39,729.40
  6. Step 6: Final answer
    x = 30,119.31

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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.