Home / 13,742.66-20,619.97-5,428.76

Finding the Fourth Proportional to 13,742.66, 20,619.97 and 5,428.76

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Solution

The fourth proportional to 13,742.66, 20,619.97 and 5,428.76 is: 8,145.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,742.66 : 20,619.97 = 5,428.76 : x
  2. Step 2: Convert to fraction form
    13,742.66/20,619.97 = 5,428.76/x
  3. Step 3: Cross multiply
    13,742.66x = 20,619.97 × 5,428.76
  4. Step 4: Simplify right side
    13,742.66x = 111,940,751.67
  5. Step 5: Solve for x
    x = 111,940,751.67/13,742.66
  6. Step 6: Final answer
    x = 8,145.49

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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.