Home / 13,620.40-18,795-7,651.60

Finding the Fourth Proportional to 13,620.40, 18,795 and 7,651.60

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Solution

The fourth proportional to 13,620.40, 18,795 and 7,651.60 is: 10,558.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.40 : 18,795 = 7,651.60 : x
  2. Step 2: Convert to fraction form
    13,620.40/18,795 = 7,651.60/x
  3. Step 3: Cross multiply
    13,620.40x = 18,795 × 7,651.60
  4. Step 4: Simplify right side
    13,620.40x = 143,811,822
  5. Step 5: Solve for x
    x = 143,811,822/13,620.40
  6. Step 6: Final answer
    x = 10,558.56

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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.