Home / 15,121.49-20,870.39-8,747.33

Finding the Fourth Proportional to 15,121.49, 20,870.39 and 8,747.33

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Solution

The fourth proportional to 15,121.49, 20,870.39 and 8,747.33 is: 12,072.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.49 : 20,870.39 = 8,747.33 : x
  2. Step 2: Convert to fraction form
    15,121.49/20,870.39 = 8,747.33/x
  3. Step 3: Cross multiply
    15,121.49x = 20,870.39 × 8,747.33
  4. Step 4: Simplify right side
    15,121.49x = 182,560,106.08
  5. Step 5: Solve for x
    x = 182,560,106.08/15,121.49
  6. Step 6: Final answer
    x = 12,072.90

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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.