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Finding the Fourth Proportional to 20,809.99, 28,721.01 and 16,367.42

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Solution

The fourth proportional to 20,809.99, 28,721.01 and 16,367.42 is: 22,589.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.99 : 28,721.01 = 16,367.42 : x
  2. Step 2: Convert to fraction form
    20,809.99/28,721.01 = 16,367.42/x
  3. Step 3: Cross multiply
    20,809.99x = 28,721.01 × 16,367.42
  4. Step 4: Simplify right side
    20,809.99x = 470,088,667.02
  5. Step 5: Solve for x
    x = 470,088,667.02/20,809.99
  6. Step 6: Final answer
    x = 22,589.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.