Home / 5,479.03-7,561.16-3,121.21

Finding the Fourth Proportional to 5,479.03, 7,561.16 and 3,121.21

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Solution

The fourth proportional to 5,479.03, 7,561.16 and 3,121.21 is: 4,307.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.03 : 7,561.16 = 3,121.21 : x
  2. Step 2: Convert to fraction form
    5,479.03/7,561.16 = 3,121.21/x
  3. Step 3: Cross multiply
    5,479.03x = 7,561.16 × 3,121.21
  4. Step 4: Simplify right side
    5,479.03x = 23,599,968.20
  5. Step 5: Solve for x
    x = 23,599,968.20/5,479.03
  6. Step 6: Final answer
    x = 4,307.33

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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.