Home / 21,982.54-30,340.48-20,211.34

Finding the Fourth Proportional to 21,982.54, 30,340.48 and 20,211.34

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Solution

The fourth proportional to 21,982.54, 30,340.48 and 20,211.34 is: 27,895.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.54 : 30,340.48 = 20,211.34 : x
  2. Step 2: Convert to fraction form
    21,982.54/30,340.48 = 20,211.34/x
  3. Step 3: Cross multiply
    21,982.54x = 30,340.48 × 20,211.34
  4. Step 4: Simplify right side
    21,982.54x = 613,221,554.81
  5. Step 5: Solve for x
    x = 613,221,554.81/21,982.54
  6. Step 6: Final answer
    x = 27,895.85

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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.