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Finding the Fourth Proportional to 20,765.38, 28,657.02 and 11,813.68

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Solution

The fourth proportional to 20,765.38, 28,657.02 and 11,813.68 is: 16,303.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.38 : 28,657.02 = 11,813.68 : x
  2. Step 2: Convert to fraction form
    20,765.38/28,657.02 = 11,813.68/x
  3. Step 3: Cross multiply
    20,765.38x = 28,657.02 × 11,813.68
  4. Step 4: Simplify right side
    20,765.38x = 338,544,864.03
  5. Step 5: Solve for x
    x = 338,544,864.03/20,765.38
  6. Step 6: Final answer
    x = 16,303.33

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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.