Home / 20,695.49-31,034.73-8,213.79

Finding the Fourth Proportional to 20,695.49, 31,034.73 and 8,213.79

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Solution

The fourth proportional to 20,695.49, 31,034.73 and 8,213.79 is: 12,317.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,695.49 : 31,034.73 = 8,213.79 : x
  2. Step 2: Convert to fraction form
    20,695.49/31,034.73 = 8,213.79/x
  3. Step 3: Cross multiply
    20,695.49x = 31,034.73 × 8,213.79
  4. Step 4: Simplify right side
    20,695.49x = 254,912,754.93
  5. Step 5: Solve for x
    x = 254,912,754.93/20,695.49
  6. Step 6: Final answer
    x = 12,317.31

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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.