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Finding the Fourth Proportional to 20,483.31, 30,728.21 and 7,335.39

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Solution

The fourth proportional to 20,483.31, 30,728.21 and 7,335.39 is: 11,004.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,483.31 : 30,728.21 = 7,335.39 : x
  2. Step 2: Convert to fraction form
    20,483.31/30,728.21 = 7,335.39/x
  3. Step 3: Cross multiply
    20,483.31x = 30,728.21 × 7,335.39
  4. Step 4: Simplify right side
    20,483.31x = 225,403,367.67
  5. Step 5: Solve for x
    x = 225,403,367.67/20,483.31
  6. Step 6: Final answer
    x = 11,004.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.