Home / 18,518.21-27,777.38-4,478.21

Finding the Fourth Proportional to 18,518.21, 27,777.38 and 4,478.21

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Solution

The fourth proportional to 18,518.21, 27,777.38 and 4,478.21 is: 6,717.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,518.21 : 27,777.38 = 4,478.21 : x
  2. Step 2: Convert to fraction form
    18,518.21/27,777.38 = 4,478.21/x
  3. Step 3: Cross multiply
    18,518.21x = 27,777.38 × 4,478.21
  4. Step 4: Simplify right side
    18,518.21x = 124,392,940.89
  5. Step 5: Solve for x
    x = 124,392,940.89/18,518.21
  6. Step 6: Final answer
    x = 6,717.33

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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.