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Finding the Fourth Proportional to 20,752.75, 28,638.81 and 11,800.81

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Solution

The fourth proportional to 20,752.75, 28,638.81 and 11,800.81 is: 16,285.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.75 : 28,638.81 = 11,800.81 : x
  2. Step 2: Convert to fraction form
    20,752.75/28,638.81 = 11,800.81/x
  3. Step 3: Cross multiply
    20,752.75x = 28,638.81 × 11,800.81
  4. Step 4: Simplify right side
    20,752.75x = 337,961,155.44
  5. Step 5: Solve for x
    x = 337,961,155.44/20,752.75
  6. Step 6: Final answer
    x = 16,285.13

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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.