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Finding the Fourth Proportional to 20,697.34, 28,563 and 11,745.22

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Solution

The fourth proportional to 20,697.34, 28,563 and 11,745.22 is: 16,208.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.34 : 28,563 = 11,745.22 : x
  2. Step 2: Convert to fraction form
    20,697.34/28,563 = 11,745.22/x
  3. Step 3: Cross multiply
    20,697.34x = 28,563 × 11,745.22
  4. Step 4: Simplify right side
    20,697.34x = 335,478,718.86
  5. Step 5: Solve for x
    x = 335,478,718.86/20,697.34
  6. Step 6: Final answer
    x = 16,208.78

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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.