Home / 21,771.10-30,043.78-12,210.99

Finding the Fourth Proportional to 21,771.10, 30,043.78 and 12,210.99

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Solution

The fourth proportional to 21,771.10, 30,043.78 and 12,210.99 is: 16,850.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,771.10 : 30,043.78 = 12,210.99 : x
  2. Step 2: Convert to fraction form
    21,771.10/30,043.78 = 12,210.99/x
  3. Step 3: Cross multiply
    21,771.10x = 30,043.78 × 12,210.99
  4. Step 4: Simplify right side
    21,771.10x = 366,864,297.14
  5. Step 5: Solve for x
    x = 366,864,297.14/21,771.10
  6. Step 6: Final answer
    x = 16,850.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.