Home / 21,311.13-31,975.91-11,438.88

Finding the Fourth Proportional to 21,311.13, 31,975.91 and 11,438.88

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Solution

The fourth proportional to 21,311.13, 31,975.91 and 11,438.88 is: 17,163.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.13 : 31,975.91 = 11,438.88 : x
  2. Step 2: Convert to fraction form
    21,311.13/31,975.91 = 11,438.88/x
  3. Step 3: Cross multiply
    21,311.13x = 31,975.91 × 11,438.88
  4. Step 4: Simplify right side
    21,311.13x = 365,768,597.38
  5. Step 5: Solve for x
    x = 365,768,597.38/21,311.13
  6. Step 6: Final answer
    x = 17,163.27

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1.5x scale

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.