Home / 21,131.62-29,161.59-12,179.06

Finding the Fourth Proportional to 21,131.62, 29,161.59 and 12,179.06

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Solution

The fourth proportional to 21,131.62, 29,161.59 and 12,179.06 is: 16,807.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.62 : 29,161.59 = 12,179.06 : x
  2. Step 2: Convert to fraction form
    21,131.62/29,161.59 = 12,179.06/x
  3. Step 3: Cross multiply
    21,131.62x = 29,161.59 × 12,179.06
  4. Step 4: Simplify right side
    21,131.62x = 355,160,672.18
  5. Step 5: Solve for x
    x = 355,160,672.18/21,131.62
  6. Step 6: Final answer
    x = 16,807.07

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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.