Home / 21,091.24-29,108.46-12,147.76

Finding the Fourth Proportional to 21,091.24, 29,108.46 and 12,147.76

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Solution

The fourth proportional to 21,091.24, 29,108.46 and 12,147.76 is: 16,765.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.24 : 29,108.46 = 12,147.76 : x
  2. Step 2: Convert to fraction form
    21,091.24/29,108.46 = 12,147.76/x
  3. Step 3: Cross multiply
    21,091.24x = 29,108.46 × 12,147.76
  4. Step 4: Simplify right side
    21,091.24x = 353,602,586.05
  5. Step 5: Solve for x
    x = 353,602,586.05/21,091.24
  6. Step 6: Final answer
    x = 16,765.38

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Double scale
Find fourth proportional to 21,092.24, 29,109.84 and 12,148.76
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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.