Home / 39,786.02-54,904.31-21,881.78

Finding the Fourth Proportional to 39,786.02, 54,904.31 and 21,881.78

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Solution

The fourth proportional to 39,786.02, 54,904.31 and 21,881.78 is: 30,196.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,786.02 : 54,904.31 = 21,881.78 : x
  2. Step 2: Convert to fraction form
    39,786.02/54,904.31 = 21,881.78/x
  3. Step 3: Cross multiply
    39,786.02x = 54,904.31 × 21,881.78
  4. Step 4: Simplify right side
    39,786.02x = 1,201,404,032.47
  5. Step 5: Solve for x
    x = 1,201,404,032.47/39,786.02
  6. Step 6: Final answer
    x = 30,196.64

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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.