Home / 21,791.47-30,078.80-18,839.02

Finding the Fourth Proportional to 21,791.47, 30,078.80 and 18,839.02

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Solution

The fourth proportional to 21,791.47, 30,078.80 and 18,839.02 is: 26,003.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,791.47 : 30,078.80 = 18,839.02 : x
  2. Step 2: Convert to fraction form
    21,791.47/30,078.80 = 18,839.02/x
  3. Step 3: Cross multiply
    21,791.47x = 30,078.80 × 18,839.02
  4. Step 4: Simplify right side
    21,791.47x = 566,654,945.38
  5. Step 5: Solve for x
    x = 566,654,945.38/21,791.47
  6. Step 6: Final answer
    x = 26,003.52

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1.5x scale

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.