Home / 5,215.37-7,823.09-4,172.78

Finding the Fourth Proportional to 5,215.37, 7,823.09 and 4,172.78

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Solution

The fourth proportional to 5,215.37, 7,823.09 and 4,172.78 is: 6,259.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.37 : 7,823.09 = 4,172.78 : x
  2. Step 2: Convert to fraction form
    5,215.37/7,823.09 = 4,172.78/x
  3. Step 3: Cross multiply
    5,215.37x = 7,823.09 × 4,172.78
  4. Step 4: Simplify right side
    5,215.37x = 32,644,063.48
  5. Step 5: Solve for x
    x = 32,644,063.48/5,215.37
  6. Step 6: Final answer
    x = 6,259.21

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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.