Home / 5,121.45-7,682.16-1,611.77

Finding the Fourth Proportional to 5,121.45, 7,682.16 and 1,611.77

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Solution

The fourth proportional to 5,121.45, 7,682.16 and 1,611.77 is: 2,417.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.45 : 7,682.16 = 1,611.77 : x
  2. Step 2: Convert to fraction form
    5,121.45/7,682.16 = 1,611.77/x
  3. Step 3: Cross multiply
    5,121.45x = 7,682.16 × 1,611.77
  4. Step 4: Simplify right side
    5,121.45x = 12,381,842.66
  5. Step 5: Solve for x
    x = 12,381,842.66/5,121.45
  6. Step 6: Final answer
    x = 2,417.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.