Home / 20,511.45-30,751.74-8,679.06

Finding the Fourth Proportional to 20,511.45, 30,751.74 and 8,679.06

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Solution

The fourth proportional to 20,511.45, 30,751.74 and 8,679.06 is: 13,012.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.45 : 30,751.74 = 8,679.06 : x
  2. Step 2: Convert to fraction form
    20,511.45/30,751.74 = 8,679.06/x
  3. Step 3: Cross multiply
    20,511.45x = 30,751.74 × 8,679.06
  4. Step 4: Simplify right side
    20,511.45x = 266,896,196.56
  5. Step 5: Solve for x
    x = 266,896,196.56/20,511.45
  6. Step 6: Final answer
    x = 13,012.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.