Home / 21,313.53-31,986.78-17,163.69

Finding the Fourth Proportional to 21,313.53, 31,986.78 and 17,163.69

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Solution

The fourth proportional to 21,313.53, 31,986.78 and 17,163.69 is: 25,758.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,313.53 : 31,986.78 = 17,163.69 : x
  2. Step 2: Convert to fraction form
    21,313.53/31,986.78 = 17,163.69/x
  3. Step 3: Cross multiply
    21,313.53x = 31,986.78 × 17,163.69
  4. Step 4: Simplify right side
    21,313.53x = 549,011,176.02
  5. Step 5: Solve for x
    x = 549,011,176.02/21,313.53
  6. Step 6: Final answer
    x = 25,758.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.