Home / 21,120.97-29,145.90-12,046.69

Finding the Fourth Proportional to 21,120.97, 29,145.90 and 12,046.69

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Solution

The fourth proportional to 21,120.97, 29,145.90 and 12,046.69 is: 16,623.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.97 : 29,145.90 = 12,046.69 : x
  2. Step 2: Convert to fraction form
    21,120.97/29,145.90 = 12,046.69/x
  3. Step 3: Cross multiply
    21,120.97x = 29,145.90 × 12,046.69
  4. Step 4: Simplify right side
    21,120.97x = 351,111,622.07
  5. Step 5: Solve for x
    x = 351,111,622.07/21,120.97
  6. Step 6: Final answer
    x = 16,623.84

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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.