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Finding the Fourth Proportional to 13,350.80, 20,026.05 and 3,990.90

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Solution

The fourth proportional to 13,350.80, 20,026.05 and 3,990.90 is: 5,986.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,350.80 : 20,026.05 = 3,990.90 : x
  2. Step 2: Convert to fraction form
    13,350.80/20,026.05 = 3,990.90/x
  3. Step 3: Cross multiply
    13,350.80x = 20,026.05 × 3,990.90
  4. Step 4: Simplify right side
    13,350.80x = 79,921,859.72
  5. Step 5: Solve for x
    x = 79,921,859.72/13,350.80
  6. Step 6: Final answer
    x = 5,986.30

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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.