Home / 5,138.30-7,707.84-2,177.40

Finding the Fourth Proportional to 5,138.30, 7,707.84 and 2,177.40

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Solution

The fourth proportional to 5,138.30, 7,707.84 and 2,177.40 is: 3,266.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.30 : 7,707.84 = 2,177.40 : x
  2. Step 2: Convert to fraction form
    5,138.30/7,707.84 = 2,177.40/x
  3. Step 3: Cross multiply
    5,138.30x = 7,707.84 × 2,177.40
  4. Step 4: Simplify right side
    5,138.30x = 16,783,050.82
  5. Step 5: Solve for x
    x = 16,783,050.82/5,138.30
  6. Step 6: Final answer
    x = 3,266.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.