Home / 39,873.89-55,026.68-21,968.78

Finding the Fourth Proportional to 39,873.89, 55,026.68 and 21,968.78

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Solution

The fourth proportional to 39,873.89, 55,026.68 and 21,968.78 is: 30,317.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,873.89 : 55,026.68 = 21,968.78 : x
  2. Step 2: Convert to fraction form
    39,873.89/55,026.68 = 21,968.78/x
  3. Step 3: Cross multiply
    39,873.89x = 55,026.68 × 21,968.78
  4. Step 4: Simplify right side
    39,873.89x = 1,208,868,642.07
  5. Step 5: Solve for x
    x = 1,208,868,642.07/39,873.89
  6. Step 6: Final answer
    x = 30,317.30

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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.