Home / 20,700.99-28,563.57-12,205.78

Finding the Fourth Proportional to 20,700.99, 28,563.57 and 12,205.78

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Solution

The fourth proportional to 20,700.99, 28,563.57 and 12,205.78 is: 16,841.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.99 : 28,563.57 = 12,205.78 : x
  2. Step 2: Convert to fraction form
    20,700.99/28,563.57 = 12,205.78/x
  3. Step 3: Cross multiply
    20,700.99x = 28,563.57 × 12,205.78
  4. Step 4: Simplify right side
    20,700.99x = 348,640,580.03
  5. Step 5: Solve for x
    x = 348,640,580.03/20,700.99
  6. Step 6: Final answer
    x = 16,841.73

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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.