Home / 21,156.99-29,195.62-12,207.38

Finding the Fourth Proportional to 21,156.99, 29,195.62 and 12,207.38

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Solution

The fourth proportional to 21,156.99, 29,195.62 and 12,207.38 is: 16,845.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.99 : 29,195.62 = 12,207.38 : x
  2. Step 2: Convert to fraction form
    21,156.99/29,195.62 = 12,207.38/x
  3. Step 3: Cross multiply
    21,156.99x = 29,195.62 × 12,207.38
  4. Step 4: Simplify right side
    21,156.99x = 356,401,966.64
  5. Step 5: Solve for x
    x = 356,401,966.64/21,156.99
  6. Step 6: Final answer
    x = 16,845.59

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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.