Home / 21,144.20-31,706.70-7,992.20

Finding the Fourth Proportional to 21,144.20, 31,706.70 and 7,992.20

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Solution

The fourth proportional to 21,144.20, 31,706.70 and 7,992.20 is: 11,984.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.20 : 31,706.70 = 7,992.20 : x
  2. Step 2: Convert to fraction form
    21,144.20/31,706.70 = 7,992.20/x
  3. Step 3: Cross multiply
    21,144.20x = 31,706.70 × 7,992.20
  4. Step 4: Simplify right side
    21,144.20x = 253,406,287.74
  5. Step 5: Solve for x
    x = 253,406,287.74/21,144.20
  6. Step 6: Final answer
    x = 11,984.67

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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.