Home / 7,122.19-9,828.76-3,935.66

Finding the Fourth Proportional to 7,122.19, 9,828.76 and 3,935.66

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Solution

The fourth proportional to 7,122.19, 9,828.76 and 3,935.66 is: 5,431.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.19 : 9,828.76 = 3,935.66 : x
  2. Step 2: Convert to fraction form
    7,122.19/9,828.76 = 3,935.66/x
  3. Step 3: Cross multiply
    7,122.19x = 9,828.76 × 3,935.66
  4. Step 4: Simplify right side
    7,122.19x = 38,682,657.58
  5. Step 5: Solve for x
    x = 38,682,657.58/7,122.19
  6. Step 6: Final answer
    x = 5,431.29

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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.