Home / 21,163.68-29,197.67-13,609.01

Finding the Fourth Proportional to 21,163.68, 29,197.67 and 13,609.01

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Solution

The fourth proportional to 21,163.68, 29,197.67 and 13,609.01 is: 18,775.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.68 : 29,197.67 = 13,609.01 : x
  2. Step 2: Convert to fraction form
    21,163.68/29,197.67 = 13,609.01/x
  3. Step 3: Cross multiply
    21,163.68x = 29,197.67 × 13,609.01
  4. Step 4: Simplify right side
    21,163.68x = 397,351,387.96
  5. Step 5: Solve for x
    x = 397,351,387.96/21,163.68
  6. Step 6: Final answer
    x = 18,775.16

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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.