Home / 7,121.55-10,670.77-4,339.78

Finding the Fourth Proportional to 7,121.55, 10,670.77 and 4,339.78

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Solution

The fourth proportional to 7,121.55, 10,670.77 and 4,339.78 is: 6,502.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.55 : 10,670.77 = 4,339.78 : x
  2. Step 2: Convert to fraction form
    7,121.55/10,670.77 = 4,339.78/x
  3. Step 3: Cross multiply
    7,121.55x = 10,670.77 × 4,339.78
  4. Step 4: Simplify right side
    7,121.55x = 46,308,772.98
  5. Step 5: Solve for x
    x = 46,308,772.98/7,121.55
  6. Step 6: Final answer
    x = 6,502.62

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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.