Home / 39,782.13-54,900.62-21,878.43

Finding the Fourth Proportional to 39,782.13, 54,900.62 and 21,878.43

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Solution

The fourth proportional to 39,782.13, 54,900.62 and 21,878.43 is: 30,192.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,782.13 : 54,900.62 = 21,878.43 : x
  2. Step 2: Convert to fraction form
    39,782.13/54,900.62 = 21,878.43/x
  3. Step 3: Cross multiply
    39,782.13x = 54,900.62 × 21,878.43
  4. Step 4: Simplify right side
    39,782.13x = 1,201,139,371.63
  5. Step 5: Solve for x
    x = 1,201,139,371.63/39,782.13
  6. Step 6: Final answer
    x = 30,192.94

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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.