Home / 20,512.65-28,307.82-12,020.88

Finding the Fourth Proportional to 20,512.65, 28,307.82 and 12,020.88

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Solution

The fourth proportional to 20,512.65, 28,307.82 and 12,020.88 is: 16,589.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.65 : 28,307.82 = 12,020.88 : x
  2. Step 2: Convert to fraction form
    20,512.65/28,307.82 = 12,020.88/x
  3. Step 3: Cross multiply
    20,512.65x = 28,307.82 × 12,020.88
  4. Step 4: Simplify right side
    20,512.65x = 340,284,907.28
  5. Step 5: Solve for x
    x = 340,284,907.28/20,512.65
  6. Step 6: Final answer
    x = 16,589.03

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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.