Home / 5,121.79-7,682.51-1,611.70

Finding the Fourth Proportional to 5,121.79, 7,682.51 and 1,611.70

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Solution

The fourth proportional to 5,121.79, 7,682.51 and 1,611.70 is: 2,417.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.79 : 7,682.51 = 1,611.70 : x
  2. Step 2: Convert to fraction form
    5,121.79/7,682.51 = 1,611.70/x
  3. Step 3: Cross multiply
    5,121.79x = 7,682.51 × 1,611.70
  4. Step 4: Simplify right side
    5,121.79x = 12,381,893.31
  5. Step 5: Solve for x
    x = 12,381,893.31/5,121.79
  6. Step 6: Final answer
    x = 2,417.49

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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.