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Finding the Fourth Proportional to 13,620.80, 18,796 and 7,652.72

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Solution

The fourth proportional to 13,620.80, 18,796 and 7,652.72 is: 10,560.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.80 : 18,796 = 7,652.72 : x
  2. Step 2: Convert to fraction form
    13,620.80/18,796 = 7,652.72/x
  3. Step 3: Cross multiply
    13,620.80x = 18,796 × 7,652.72
  4. Step 4: Simplify right side
    13,620.80x = 143,840,525.12
  5. Step 5: Solve for x
    x = 143,840,525.12/13,620.80
  6. Step 6: Final answer
    x = 10,560.36

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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.