Home / 21,181.90-29,226.81-12,798.42

Finding the Fourth Proportional to 21,181.90, 29,226.81 and 12,798.42

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Solution

The fourth proportional to 21,181.90, 29,226.81 and 12,798.42 is: 17,659.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.90 : 29,226.81 = 12,798.42 : x
  2. Step 2: Convert to fraction form
    21,181.90/29,226.81 = 12,798.42/x
  3. Step 3: Cross multiply
    21,181.90x = 29,226.81 × 12,798.42
  4. Step 4: Simplify right side
    21,181.90x = 374,056,989.64
  5. Step 5: Solve for x
    x = 374,056,989.64/21,181.90
  6. Step 6: Final answer
    x = 17,659.27

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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.