Home / 5,138.68-7,707.25-1,440.69

Finding the Fourth Proportional to 5,138.68, 7,707.25 and 1,440.69

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Solution

The fourth proportional to 5,138.68, 7,707.25 and 1,440.69 is: 2,160.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.68 : 7,707.25 = 1,440.69 : x
  2. Step 2: Convert to fraction form
    5,138.68/7,707.25 = 1,440.69/x
  3. Step 3: Cross multiply
    5,138.68x = 7,707.25 × 1,440.69
  4. Step 4: Simplify right side
    5,138.68x = 11,103,758.00
  5. Step 5: Solve for x
    x = 11,103,758.00/5,138.68
  6. Step 6: Final answer
    x = 2,160.82

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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.