Home / 7,120.37-9,828.11-4,135.66

Finding the Fourth Proportional to 7,120.37, 9,828.11 and 4,135.66

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Solution

The fourth proportional to 7,120.37, 9,828.11 and 4,135.66 is: 5,708.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.37 : 9,828.11 = 4,135.66 : x
  2. Step 2: Convert to fraction form
    7,120.37/9,828.11 = 4,135.66/x
  3. Step 3: Cross multiply
    7,120.37x = 9,828.11 × 4,135.66
  4. Step 4: Simplify right side
    7,120.37x = 40,645,707.17
  5. Step 5: Solve for x
    x = 40,645,707.17/7,120.37
  6. Step 6: Final answer
    x = 5,708.37

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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.