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Finding the Fourth Proportional to 20,651.52, 30,945.74 and 15,360.94

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Solution

The fourth proportional to 20,651.52, 30,945.74 and 15,360.94 is: 23,017.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.52 : 30,945.74 = 15,360.94 : x
  2. Step 2: Convert to fraction form
    20,651.52/30,945.74 = 15,360.94/x
  3. Step 3: Cross multiply
    20,651.52x = 30,945.74 × 15,360.94
  4. Step 4: Simplify right side
    20,651.52x = 475,355,660.48
  5. Step 5: Solve for x
    x = 475,355,660.48/20,651.52
  6. Step 6: Final answer
    x = 23,017.96

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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.