Home / 21,177.06-29,220.30-12,105.29

Finding the Fourth Proportional to 21,177.06, 29,220.30 and 12,105.29

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Solution

The fourth proportional to 21,177.06, 29,220.30 and 12,105.29 is: 16,702.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.06 : 29,220.30 = 12,105.29 : x
  2. Step 2: Convert to fraction form
    21,177.06/29,220.30 = 12,105.29/x
  3. Step 3: Cross multiply
    21,177.06x = 29,220.30 × 12,105.29
  4. Step 4: Simplify right side
    21,177.06x = 353,720,205.39
  5. Step 5: Solve for x
    x = 353,720,205.39/21,177.06
  6. Step 6: Final answer
    x = 16,702.99

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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.