Home / 20,805.12-31,207.68-10,949.04

Finding the Fourth Proportional to 20,805.12, 31,207.68 and 10,949.04

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Solution

The fourth proportional to 20,805.12, 31,207.68 and 10,949.04 is: 16,423.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.12 : 31,207.68 = 10,949.04 : x
  2. Step 2: Convert to fraction form
    20,805.12/31,207.68 = 10,949.04/x
  3. Step 3: Cross multiply
    20,805.12x = 31,207.68 × 10,949.04
  4. Step 4: Simplify right side
    20,805.12x = 341,694,136.63
  5. Step 5: Solve for x
    x = 341,694,136.63/20,805.12
  6. Step 6: Final answer
    x = 16,423.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.