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Finding the Fourth Proportional to 13,888.87, 20,841.10 and 13,783.37

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Solution

The fourth proportional to 13,888.87, 20,841.10 and 13,783.37 is: 20,682.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.87 : 20,841.10 = 13,783.37 : x
  2. Step 2: Convert to fraction form
    13,888.87/20,841.10 = 13,783.37/x
  3. Step 3: Cross multiply
    13,888.87x = 20,841.10 × 13,783.37
  4. Step 4: Simplify right side
    13,888.87x = 287,260,453.84
  5. Step 5: Solve for x
    x = 287,260,453.84/13,888.87
  6. Step 6: Final answer
    x = 20,682.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.