Home / 39,139.05-54,011.59-21,911.43

Finding the Fourth Proportional to 39,139.05, 54,011.59 and 21,911.43

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Solution

The fourth proportional to 39,139.05, 54,011.59 and 21,911.43 is: 30,237.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,139.05 : 54,011.59 = 21,911.43 : x
  2. Step 2: Convert to fraction form
    39,139.05/54,011.59 = 21,911.43/x
  3. Step 3: Cross multiply
    39,139.05x = 54,011.59 × 21,911.43
  4. Step 4: Simplify right side
    39,139.05x = 1,183,471,173.47
  5. Step 5: Solve for x
    x = 1,183,471,173.47/39,139.05
  6. Step 6: Final answer
    x = 30,237.61

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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.