Home / 19,708,986-27,000,857.22-18,972,128.20

Finding the Fourth Proportional to 19,708,986, 27,000,857.22 and 18,972,128.20

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Solution

The fourth proportional to 19,708,986, 27,000,857.22 and 18,972,128.20 is: 25,991,378.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,708,986 : 27,000,857.22 = 18,972,128.20 : x
  2. Step 2: Convert to fraction form
    19,708,986/27,000,857.22 = 18,972,128.20/x
  3. Step 3: Cross multiply
    19,708,986x = 27,000,857.22 × 18,972,128.20
  4. Step 4: Simplify right side
    19,708,986x = 512,263,724,687,735.56
  5. Step 5: Solve for x
    x = 512,263,724,687,735.56/19,708,986
  6. Step 6: Final answer
    x = 25,991,378.99

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.