Home / 21,961.05-30,306.29-11,889.60

Finding the Fourth Proportional to 21,961.05, 30,306.29 and 11,889.60

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Solution

The fourth proportional to 21,961.05, 30,306.29 and 11,889.60 is: 16,407.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.05 : 30,306.29 = 11,889.60 : x
  2. Step 2: Convert to fraction form
    21,961.05/30,306.29 = 11,889.60/x
  3. Step 3: Cross multiply
    21,961.05x = 30,306.29 × 11,889.60
  4. Step 4: Simplify right side
    21,961.05x = 360,329,665.58
  5. Step 5: Solve for x
    x = 360,329,665.58/21,961.05
  6. Step 6: Final answer
    x = 16,407.67

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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.