Home / 21,982.70-30,341.62-12,556.72

Finding the Fourth Proportional to 21,982.70, 30,341.62 and 12,556.72

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Solution

The fourth proportional to 21,982.70, 30,341.62 and 12,556.72 is: 17,331.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.70 : 30,341.62 = 12,556.72 : x
  2. Step 2: Convert to fraction form
    21,982.70/30,341.62 = 12,556.72/x
  3. Step 3: Cross multiply
    21,982.70x = 30,341.62 × 12,556.72
  4. Step 4: Simplify right side
    21,982.70x = 380,991,226.69
  5. Step 5: Solve for x
    x = 380,991,226.69/21,982.70
  6. Step 6: Final answer
    x = 17,331.41

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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.