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Finding the Fourth Proportional to 20,273.90, 30,411.86 and 7,789.53

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Solution

The fourth proportional to 20,273.90, 30,411.86 and 7,789.53 is: 11,684.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,273.90 : 30,411.86 = 7,789.53 : x
  2. Step 2: Convert to fraction form
    20,273.90/30,411.86 = 7,789.53/x
  3. Step 3: Cross multiply
    20,273.90x = 30,411.86 × 7,789.53
  4. Step 4: Simplify right side
    20,273.90x = 236,894,170.92
  5. Step 5: Solve for x
    x = 236,894,170.92/20,273.90
  6. Step 6: Final answer
    x = 11,684.69

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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.