Home / 21,611.81-29,824.61-13,228.31

Finding the Fourth Proportional to 21,611.81, 29,824.61 and 13,228.31

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Solution

The fourth proportional to 21,611.81, 29,824.61 and 13,228.31 is: 18,255.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,611.81 : 29,824.61 = 13,228.31 : x
  2. Step 2: Convert to fraction form
    21,611.81/29,824.61 = 13,228.31/x
  3. Step 3: Cross multiply
    21,611.81x = 29,824.61 × 13,228.31
  4. Step 4: Simplify right side
    21,611.81x = 394,529,195.13
  5. Step 5: Solve for x
    x = 394,529,195.13/21,611.81
  6. Step 6: Final answer
    x = 18,255.26

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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.