Home / 5,181.21-7,721.82-5,172.98

Finding the Fourth Proportional to 5,181.21, 7,721.82 and 5,172.98

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Solution

The fourth proportional to 5,181.21, 7,721.82 and 5,172.98 is: 7,709.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.21 : 7,721.82 = 5,172.98 : x
  2. Step 2: Convert to fraction form
    5,181.21/7,721.82 = 5,172.98/x
  3. Step 3: Cross multiply
    5,181.21x = 7,721.82 × 5,172.98
  4. Step 4: Simplify right side
    5,181.21x = 39,944,781.81
  5. Step 5: Solve for x
    x = 39,944,781.81/5,181.21
  6. Step 6: Final answer
    x = 7,709.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.