Home / 20,622.31-28,458.49-12,125.41

Finding the Fourth Proportional to 20,622.31, 28,458.49 and 12,125.41

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Solution

The fourth proportional to 20,622.31, 28,458.49 and 12,125.41 is: 16,732.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.31 : 28,458.49 = 12,125.41 : x
  2. Step 2: Convert to fraction form
    20,622.31/28,458.49 = 12,125.41/x
  3. Step 3: Cross multiply
    20,622.31x = 28,458.49 × 12,125.41
  4. Step 4: Simplify right side
    20,622.31x = 345,070,656.31
  5. Step 5: Solve for x
    x = 345,070,656.31/20,622.31
  6. Step 6: Final answer
    x = 16,732.88

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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.