Home / 15,511.20-21,405.12-8,796.96

Finding the Fourth Proportional to 15,511.20, 21,405.12 and 8,796.96

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Solution

The fourth proportional to 15,511.20, 21,405.12 and 8,796.96 is: 12,139.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.20 : 21,405.12 = 8,796.96 : x
  2. Step 2: Convert to fraction form
    15,511.20/21,405.12 = 8,796.96/x
  3. Step 3: Cross multiply
    15,511.20x = 21,405.12 × 8,796.96
  4. Step 4: Simplify right side
    15,511.20x = 188,299,984.44
  5. Step 5: Solve for x
    x = 188,299,984.44/15,511.20
  6. Step 6: Final answer
    x = 12,139.61

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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.