Home / 7,121.40-10,735.44-6,645.66

Finding the Fourth Proportional to 7,121.40, 10,735.44 and 6,645.66

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Solution

The fourth proportional to 7,121.40, 10,735.44 and 6,645.66 is: 10,018.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.40 : 10,735.44 = 6,645.66 : x
  2. Step 2: Convert to fraction form
    7,121.40/10,735.44 = 6,645.66/x
  3. Step 3: Cross multiply
    7,121.40x = 10,735.44 × 6,645.66
  4. Step 4: Simplify right side
    7,121.40x = 71,344,084.19
  5. Step 5: Solve for x
    x = 71,344,084.19/7,121.40
  6. Step 6: Final answer
    x = 10,018.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.