Home / 39,719.82-54,814.26-21,816

Finding the Fourth Proportional to 39,719.82, 54,814.26 and 21,816

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Solution

The fourth proportional to 39,719.82, 54,814.26 and 21,816 is: 30,106.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,719.82 : 54,814.26 = 21,816 : x
  2. Step 2: Convert to fraction form
    39,719.82/54,814.26 = 21,816/x
  3. Step 3: Cross multiply
    39,719.82x = 54,814.26 × 21,816
  4. Step 4: Simplify right side
    39,719.82x = 1,195,827,896.16
  5. Step 5: Solve for x
    x = 1,195,827,896.16/39,719.82
  6. Step 6: Final answer
    x = 30,106.58

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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.