Home / 20,113.56-30,166.38-10,115.58

Finding the Fourth Proportional to 20,113.56, 30,166.38 and 10,115.58

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Solution

The fourth proportional to 20,113.56, 30,166.38 and 10,115.58 is: 15,171.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,113.56 : 30,166.38 = 10,115.58 : x
  2. Step 2: Convert to fraction form
    20,113.56/30,166.38 = 10,115.58/x
  3. Step 3: Cross multiply
    20,113.56x = 30,166.38 × 10,115.58
  4. Step 4: Simplify right side
    20,113.56x = 305,150,430.20
  5. Step 5: Solve for x
    x = 305,150,430.20/20,113.56
  6. Step 6: Final answer
    x = 15,171.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.