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Finding the Fourth Proportional to 21,195, 29,228.64 and 14,021.64

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Solution

The fourth proportional to 21,195, 29,228.64 and 14,021.64 is: 19,336.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195 : 29,228.64 = 14,021.64 : x
  2. Step 2: Convert to fraction form
    21,195/29,228.64 = 14,021.64/x
  3. Step 3: Cross multiply
    21,195x = 29,228.64 × 14,021.64
  4. Step 4: Simplify right side
    21,195x = 409,833,467.77
  5. Step 5: Solve for x
    x = 409,833,467.77/21,195
  6. Step 6: Final answer
    x = 19,336.33

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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.