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Finding the Fourth Proportional to 20,368.80, 30,589.65 and 19,712.70

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Solution

The fourth proportional to 20,368.80, 30,589.65 and 19,712.70 is: 29,604.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,368.80 : 30,589.65 = 19,712.70 : x
  2. Step 2: Convert to fraction form
    20,368.80/30,589.65 = 19,712.70/x
  3. Step 3: Cross multiply
    20,368.80x = 30,589.65 × 19,712.70
  4. Step 4: Simplify right side
    20,368.80x = 603,004,593.56
  5. Step 5: Solve for x
    x = 603,004,593.56/20,368.80
  6. Step 6: Final answer
    x = 29,604.33

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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.