Home / 9,151.45-12,629.22-5,172.58

Finding the Fourth Proportional to 9,151.45, 12,629.22 and 5,172.58

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Solution

The fourth proportional to 9,151.45, 12,629.22 and 5,172.58 is: 7,138.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,151.45 : 12,629.22 = 5,172.58 : x
  2. Step 2: Convert to fraction form
    9,151.45/12,629.22 = 5,172.58/x
  3. Step 3: Cross multiply
    9,151.45x = 12,629.22 × 5,172.58
  4. Step 4: Simplify right side
    9,151.45x = 65,325,619.21
  5. Step 5: Solve for x
    x = 65,325,619.21/9,151.45
  6. Step 6: Final answer
    x = 7,138.28

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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.