Home / 39,767.84-54,879.60-21,864

Finding the Fourth Proportional to 39,767.84, 54,879.60 and 21,864

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Solution

The fourth proportional to 39,767.84, 54,879.60 and 21,864 is: 30,172.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,767.84 : 54,879.60 = 21,864 : x
  2. Step 2: Convert to fraction form
    39,767.84/54,879.60 = 21,864/x
  3. Step 3: Cross multiply
    39,767.84x = 54,879.60 × 21,864
  4. Step 4: Simplify right side
    39,767.84x = 1,199,887,574.40
  5. Step 5: Solve for x
    x = 1,199,887,574.40/39,767.84
  6. Step 6: Final answer
    x = 30,172.31

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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.