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Finding the Fourth Proportional to 20,657.87, 30,986.75 and 5,866.94

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Solution

The fourth proportional to 20,657.87, 30,986.75 and 5,866.94 is: 8,800.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.87 : 30,986.75 = 5,866.94 : x
  2. Step 2: Convert to fraction form
    20,657.87/30,986.75 = 5,866.94/x
  3. Step 3: Cross multiply
    20,657.87x = 30,986.75 × 5,866.94
  4. Step 4: Simplify right side
    20,657.87x = 181,797,218.78
  5. Step 5: Solve for x
    x = 181,797,218.78/20,657.87
  6. Step 6: Final answer
    x = 8,800.39

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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.