Home / 7,120.51-9,826.25-4,138.09

Finding the Fourth Proportional to 7,120.51, 9,826.25 and 4,138.09

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Solution

The fourth proportional to 7,120.51, 9,826.25 and 4,138.09 is: 5,710.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.51 : 9,826.25 = 4,138.09 : x
  2. Step 2: Convert to fraction form
    7,120.51/9,826.25 = 4,138.09/x
  3. Step 3: Cross multiply
    7,120.51x = 9,826.25 × 4,138.09
  4. Step 4: Simplify right side
    7,120.51x = 40,661,861.61
  5. Step 5: Solve for x
    x = 40,661,861.61/7,120.51
  6. Step 6: Final answer
    x = 5,710.53

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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.