Home / 20,621.05-28,461.11-12,125.97

Finding the Fourth Proportional to 20,621.05, 28,461.11 and 12,125.97

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Solution

The fourth proportional to 20,621.05, 28,461.11 and 12,125.97 is: 16,736.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.05 : 28,461.11 = 12,125.97 : x
  2. Step 2: Convert to fraction form
    20,621.05/28,461.11 = 12,125.97/x
  3. Step 3: Cross multiply
    20,621.05x = 28,461.11 × 12,125.97
  4. Step 4: Simplify right side
    20,621.05x = 345,118,505.40
  5. Step 5: Solve for x
    x = 345,118,505.40/20,621.05
  6. Step 6: Final answer
    x = 16,736.23

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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.