Home / 7,221.12-9,950.88-5,121.60

Finding the Fourth Proportional to 7,221.12, 9,950.88 and 5,121.60

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Solution

The fourth proportional to 7,221.12, 9,950.88 and 5,121.60 is: 7,057.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.12 : 9,950.88 = 5,121.60 : x
  2. Step 2: Convert to fraction form
    7,221.12/9,950.88 = 5,121.60/x
  3. Step 3: Cross multiply
    7,221.12x = 9,950.88 × 5,121.60
  4. Step 4: Simplify right side
    7,221.12x = 50,964,427.01
  5. Step 5: Solve for x
    x = 50,964,427.01/7,221.12
  6. Step 6: Final answer
    x = 7,057.69

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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.