Home / 5,479.96-7,561.42-3,121.64

Finding the Fourth Proportional to 5,479.96, 7,561.42 and 3,121.64

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Solution

The fourth proportional to 5,479.96, 7,561.42 and 3,121.64 is: 4,307.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.96 : 7,561.42 = 3,121.64 : x
  2. Step 2: Convert to fraction form
    5,479.96/7,561.42 = 3,121.64/x
  3. Step 3: Cross multiply
    5,479.96x = 7,561.42 × 3,121.64
  4. Step 4: Simplify right side
    5,479.96x = 23,604,031.13
  5. Step 5: Solve for x
    x = 23,604,031.13/5,479.96
  6. Step 6: Final answer
    x = 4,307.34

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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.