Home / 18,561.21-25,581-13,517.45

Finding the Fourth Proportional to 18,561.21, 25,581 and 13,517.45

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Solution

The fourth proportional to 18,561.21, 25,581 and 13,517.45 is: 18,629.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.21 : 25,581 = 13,517.45 : x
  2. Step 2: Convert to fraction form
    18,561.21/25,581 = 13,517.45/x
  3. Step 3: Cross multiply
    18,561.21x = 25,581 × 13,517.45
  4. Step 4: Simplify right side
    18,561.21x = 345,789,760.55
  5. Step 5: Solve for x
    x = 345,789,760.55/18,561.21
  6. Step 6: Final answer
    x = 18,629.70

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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.