Home / 5,138.88-7,091.28-2,900.64

Finding the Fourth Proportional to 5,138.88, 7,091.28 and 2,900.64

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Solution

The fourth proportional to 5,138.88, 7,091.28 and 2,900.64 is: 4,002.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.88 : 7,091.28 = 2,900.64 : x
  2. Step 2: Convert to fraction form
    5,138.88/7,091.28 = 2,900.64/x
  3. Step 3: Cross multiply
    5,138.88x = 7,091.28 × 2,900.64
  4. Step 4: Simplify right side
    5,138.88x = 20,569,250.42
  5. Step 5: Solve for x
    x = 20,569,250.42/5,138.88
  6. Step 6: Final answer
    x = 4,002.67

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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.