Home / 21,421.62-29,561.67-11,990.34

Finding the Fourth Proportional to 21,421.62, 29,561.67 and 11,990.34

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Solution

The fourth proportional to 21,421.62, 29,561.67 and 11,990.34 is: 16,546.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.62 : 29,561.67 = 11,990.34 : x
  2. Step 2: Convert to fraction form
    21,421.62/29,561.67 = 11,990.34/x
  3. Step 3: Cross multiply
    21,421.62x = 29,561.67 × 11,990.34
  4. Step 4: Simplify right side
    21,421.62x = 354,454,474.27
  5. Step 5: Solve for x
    x = 354,454,474.27/21,421.62
  6. Step 6: Final answer
    x = 16,546.58

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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.