Home / 21,147.51-29,181.20-11,713.71

Finding the Fourth Proportional to 21,147.51, 29,181.20 and 11,713.71

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Solution

The fourth proportional to 21,147.51, 29,181.20 and 11,713.71 is: 16,163.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.51 : 29,181.20 = 11,713.71 : x
  2. Step 2: Convert to fraction form
    21,147.51/29,181.20 = 11,713.71/x
  3. Step 3: Cross multiply
    21,147.51x = 29,181.20 × 11,713.71
  4. Step 4: Simplify right side
    21,147.51x = 341,820,114.25
  5. Step 5: Solve for x
    x = 341,820,114.25/21,147.51
  6. Step 6: Final answer
    x = 16,163.61

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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.