Home / 9,138.09-12,613.19-5,361.42

Finding the Fourth Proportional to 9,138.09, 12,613.19 and 5,361.42

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Solution

The fourth proportional to 9,138.09, 12,613.19 and 5,361.42 is: 7,400.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.09 : 12,613.19 = 5,361.42 : x
  2. Step 2: Convert to fraction form
    9,138.09/12,613.19 = 5,361.42/x
  3. Step 3: Cross multiply
    9,138.09x = 12,613.19 × 5,361.42
  4. Step 4: Simplify right side
    9,138.09x = 67,624,609.13
  5. Step 5: Solve for x
    x = 67,624,609.13/9,138.09
  6. Step 6: Final answer
    x = 7,400.30

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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.