Home / 5,138.81-7,091.57-2,900.69

Finding the Fourth Proportional to 5,138.81, 7,091.57 and 2,900.69

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Solution

The fourth proportional to 5,138.81, 7,091.57 and 2,900.69 is: 4,002.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.81 : 7,091.57 = 2,900.69 : x
  2. Step 2: Convert to fraction form
    5,138.81/7,091.57 = 2,900.69/x
  3. Step 3: Cross multiply
    5,138.81x = 7,091.57 × 2,900.69
  4. Step 4: Simplify right side
    5,138.81x = 20,570,396.22
  5. Step 5: Solve for x
    x = 20,570,396.22/5,138.81
  6. Step 6: Final answer
    x = 4,002.95

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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.