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Finding the Fourth Proportional to 20,379.99, 30,570.90 and 5,588.58

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Solution

The fourth proportional to 20,379.99, 30,570.90 and 5,588.58 is: 8,383.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.99 : 30,570.90 = 5,588.58 : x
  2. Step 2: Convert to fraction form
    20,379.99/30,570.90 = 5,588.58/x
  3. Step 3: Cross multiply
    20,379.99x = 30,570.90 × 5,588.58
  4. Step 4: Simplify right side
    20,379.99x = 170,847,920.32
  5. Step 5: Solve for x
    x = 170,847,920.32/20,379.99
  6. Step 6: Final answer
    x = 8,383.12

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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.