Home / 20,261.70-27,930.51-15,777.54

Finding the Fourth Proportional to 20,261.70, 27,930.51 and 15,777.54

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Solution

The fourth proportional to 20,261.70, 27,930.51 and 15,777.54 is: 21,749.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,261.70 : 27,930.51 = 15,777.54 : x
  2. Step 2: Convert to fraction form
    20,261.70/27,930.51 = 15,777.54/x
  3. Step 3: Cross multiply
    20,261.70x = 27,930.51 × 15,777.54
  4. Step 4: Simplify right side
    20,261.70x = 440,674,738.75
  5. Step 5: Solve for x
    x = 440,674,738.75/20,261.70
  6. Step 6: Final answer
    x = 21,749.15

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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.