Home / 21,178.06-29,221.68-12,106.29

Finding the Fourth Proportional to 21,178.06, 29,221.68 and 12,106.29

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Solution

The fourth proportional to 21,178.06, 29,221.68 and 12,106.29 is: 16,704.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.06 : 29,221.68 = 12,106.29 : x
  2. Step 2: Convert to fraction form
    21,178.06/29,221.68 = 12,106.29/x
  3. Step 3: Cross multiply
    21,178.06x = 29,221.68 × 12,106.29
  4. Step 4: Simplify right side
    21,178.06x = 353,766,132.37
  5. Step 5: Solve for x
    x = 353,766,132.37/21,178.06
  6. Step 6: Final answer
    x = 16,704.37

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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.