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Finding the Fourth Proportional to 13,763.55, 18,993.68 and 7,795.21

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Solution

The fourth proportional to 13,763.55, 18,993.68 and 7,795.21 is: 10,757.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,763.55 : 18,993.68 = 7,795.21 : x
  2. Step 2: Convert to fraction form
    13,763.55/18,993.68 = 7,795.21/x
  3. Step 3: Cross multiply
    13,763.55x = 18,993.68 × 7,795.21
  4. Step 4: Simplify right side
    13,763.55x = 148,059,724.27
  5. Step 5: Solve for x
    x = 148,059,724.27/13,763.55
  6. Step 6: Final answer
    x = 10,757.38

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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.