Home / 13,163.03-18,158.78-7,781.84

Finding the Fourth Proportional to 13,163.03, 18,158.78 and 7,781.84

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Solution

The fourth proportional to 13,163.03, 18,158.78 and 7,781.84 is: 10,735.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,163.03 : 18,158.78 = 7,781.84 : x
  2. Step 2: Convert to fraction form
    13,163.03/18,158.78 = 7,781.84/x
  3. Step 3: Cross multiply
    13,163.03x = 18,158.78 × 7,781.84
  4. Step 4: Simplify right side
    13,163.03x = 141,308,681.65
  5. Step 5: Solve for x
    x = 141,308,681.65/13,163.03
  6. Step 6: Final answer
    x = 10,735.27

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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.