Home / 21,072.20-29,080.48-12,119.70

Finding the Fourth Proportional to 21,072.20, 29,080.48 and 12,119.70

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Solution

The fourth proportional to 21,072.20, 29,080.48 and 12,119.70 is: 16,725.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.20 : 29,080.48 = 12,119.70 : x
  2. Step 2: Convert to fraction form
    21,072.20/29,080.48 = 12,119.70/x
  3. Step 3: Cross multiply
    21,072.20x = 29,080.48 × 12,119.70
  4. Step 4: Simplify right side
    21,072.20x = 352,446,487.46
  5. Step 5: Solve for x
    x = 352,446,487.46/21,072.20
  6. Step 6: Final answer
    x = 16,725.66

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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.