Home / 21,112.45-29,132.62-12,162.85

Finding the Fourth Proportional to 21,112.45, 29,132.62 and 12,162.85

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Solution

The fourth proportional to 21,112.45, 29,132.62 and 12,162.85 is: 16,783.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.45 : 29,132.62 = 12,162.85 : x
  2. Step 2: Convert to fraction form
    21,112.45/29,132.62 = 12,162.85/x
  3. Step 3: Cross multiply
    21,112.45x = 29,132.62 × 12,162.85
  4. Step 4: Simplify right side
    21,112.45x = 354,335,687.17
  5. Step 5: Solve for x
    x = 354,335,687.17/21,112.45
  6. Step 6: Final answer
    x = 16,783.26

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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.