Home / 20,984.91-28,959.19-11,553.47

Finding the Fourth Proportional to 20,984.91, 28,959.19 and 11,553.47

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Solution

The fourth proportional to 20,984.91, 28,959.19 and 11,553.47 is: 15,943.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.91 : 28,959.19 = 11,553.47 : x
  2. Step 2: Convert to fraction form
    20,984.91/28,959.19 = 11,553.47/x
  3. Step 3: Cross multiply
    20,984.91x = 28,959.19 × 11,553.47
  4. Step 4: Simplify right side
    20,984.91x = 334,579,067.81
  5. Step 5: Solve for x
    x = 334,579,067.81/20,984.91
  6. Step 6: Final answer
    x = 15,943.80

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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.