Home / 21,100.12-29,120.93-12,148

Finding the Fourth Proportional to 21,100.12, 29,120.93 and 12,148

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Solution

The fourth proportional to 21,100.12, 29,120.93 and 12,148 is: 16,765.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.12 : 29,120.93 = 12,148 : x
  2. Step 2: Convert to fraction form
    21,100.12/29,120.93 = 12,148/x
  3. Step 3: Cross multiply
    21,100.12x = 29,120.93 × 12,148
  4. Step 4: Simplify right side
    21,100.12x = 353,761,057.64
  5. Step 5: Solve for x
    x = 353,761,057.64/21,100.12
  6. Step 6: Final answer
    x = 16,765.83

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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.