Home / 21,629.78-29,851.96-12,680.80

Finding the Fourth Proportional to 21,629.78, 29,851.96 and 12,680.80

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Solution

The fourth proportional to 21,629.78, 29,851.96 and 12,680.80 is: 17,501.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,629.78 : 29,851.96 = 12,680.80 : x
  2. Step 2: Convert to fraction form
    21,629.78/29,851.96 = 12,680.80/x
  3. Step 3: Cross multiply
    21,629.78x = 29,851.96 × 12,680.80
  4. Step 4: Simplify right side
    21,629.78x = 378,546,734.37
  5. Step 5: Solve for x
    x = 378,546,734.37/21,629.78
  6. Step 6: Final answer
    x = 17,501.18

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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.