Home / 21,179.90-29,224.05-12,796.42

Finding the Fourth Proportional to 21,179.90, 29,224.05 and 12,796.42

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Solution

The fourth proportional to 21,179.90, 29,224.05 and 12,796.42 is: 17,656.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.90 : 29,224.05 = 12,796.42 : x
  2. Step 2: Convert to fraction form
    21,179.90/29,224.05 = 12,796.42/x
  3. Step 3: Cross multiply
    21,179.90x = 29,224.05 × 12,796.42
  4. Step 4: Simplify right side
    21,179.90x = 373,963,217.90
  5. Step 5: Solve for x
    x = 373,963,217.90/21,179.90
  6. Step 6: Final answer
    x = 17,656.51

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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.