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Finding the Fourth Proportional to 20,997.48, 28,952.20 and 16,745.20

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Solution

The fourth proportional to 20,997.48, 28,952.20 and 16,745.20 is: 23,088.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.48 : 28,952.20 = 16,745.20 : x
  2. Step 2: Convert to fraction form
    20,997.48/28,952.20 = 16,745.20/x
  3. Step 3: Cross multiply
    20,997.48x = 28,952.20 × 16,745.20
  4. Step 4: Simplify right side
    20,997.48x = 484,810,379.44
  5. Step 5: Solve for x
    x = 484,810,379.44/20,997.48
  6. Step 6: Final answer
    x = 23,088.98

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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.