Home / 21,008.50-28,991.82-12,629.86

Finding the Fourth Proportional to 21,008.50, 28,991.82 and 12,629.86

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Solution

The fourth proportional to 21,008.50, 28,991.82 and 12,629.86 is: 17,429.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.50 : 28,991.82 = 12,629.86 : x
  2. Step 2: Convert to fraction form
    21,008.50/28,991.82 = 12,629.86/x
  3. Step 3: Cross multiply
    21,008.50x = 28,991.82 × 12,629.86
  4. Step 4: Simplify right side
    21,008.50x = 366,162,627.75
  5. Step 5: Solve for x
    x = 366,162,627.75/21,008.50
  6. Step 6: Final answer
    x = 17,429.26

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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.