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Finding the Fourth Proportional to 20,292, 28,003.56 and 11,339.88

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Solution

The fourth proportional to 20,292, 28,003.56 and 11,339.88 is: 15,649.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,292 : 28,003.56 = 11,339.88 : x
  2. Step 2: Convert to fraction form
    20,292/28,003.56 = 11,339.88/x
  3. Step 3: Cross multiply
    20,292x = 28,003.56 × 11,339.88
  4. Step 4: Simplify right side
    20,292x = 317,557,009.97
  5. Step 5: Solve for x
    x = 317,557,009.97/20,292
  6. Step 6: Final answer
    x = 15,649.37

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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.