Home / 20,511.49-30,754.09-8,662.05

Finding the Fourth Proportional to 20,511.49, 30,754.09 and 8,662.05

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Solution

The fourth proportional to 20,511.49, 30,754.09 and 8,662.05 is: 12,987.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.49 : 30,754.09 = 8,662.05 : x
  2. Step 2: Convert to fraction form
    20,511.49/30,754.09 = 8,662.05/x
  3. Step 3: Cross multiply
    20,511.49x = 30,754.09 × 8,662.05
  4. Step 4: Simplify right side
    20,511.49x = 266,393,443.63
  5. Step 5: Solve for x
    x = 266,393,443.63/20,511.49
  6. Step 6: Final answer
    x = 12,987.52

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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.