Home / 21,093.04-29,106.21-12,138.79

Finding the Fourth Proportional to 21,093.04, 29,106.21 and 12,138.79

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Solution

The fourth proportional to 21,093.04, 29,106.21 and 12,138.79 is: 16,750.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,093.04 : 29,106.21 = 12,138.79 : x
  2. Step 2: Convert to fraction form
    21,093.04/29,106.21 = 12,138.79/x
  3. Step 3: Cross multiply
    21,093.04x = 29,106.21 × 12,138.79
  4. Step 4: Simplify right side
    21,093.04x = 353,314,170.89
  5. Step 5: Solve for x
    x = 353,314,170.89/21,093.04
  6. Step 6: Final answer
    x = 16,750.27

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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.