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Finding the Fourth Proportional to 13,350.24, 18,420.48 and 7,758.24

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Solution

The fourth proportional to 13,350.24, 18,420.48 and 7,758.24 is: 10,704.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,350.24 : 18,420.48 = 7,758.24 : x
  2. Step 2: Convert to fraction form
    13,350.24/18,420.48 = 7,758.24/x
  3. Step 3: Cross multiply
    13,350.24x = 18,420.48 × 7,758.24
  4. Step 4: Simplify right side
    13,350.24x = 142,910,504.76
  5. Step 5: Solve for x
    x = 142,910,504.76/13,350.24
  6. Step 6: Final answer
    x = 10,704.71

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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.