Home / 9,151.16-12,629.12-5,172.62

Finding the Fourth Proportional to 9,151.16, 12,629.12 and 5,172.62

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Solution

The fourth proportional to 9,151.16, 12,629.12 and 5,172.62 is: 7,138.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,151.16 : 12,629.12 = 5,172.62 : x
  2. Step 2: Convert to fraction form
    9,151.16/12,629.12 = 5,172.62/x
  3. Step 3: Cross multiply
    9,151.16x = 12,629.12 × 5,172.62
  4. Step 4: Simplify right side
    9,151.16x = 65,325,549.69
  5. Step 5: Solve for x
    x = 65,325,549.69/9,151.16
  6. Step 6: Final answer
    x = 7,138.50

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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.