Home / 21,181.97-31,771.23-7,141.70

Finding the Fourth Proportional to 21,181.97, 31,771.23 and 7,141.70

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Solution

The fourth proportional to 21,181.97, 31,771.23 and 7,141.70 is: 10,711.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.97 : 31,771.23 = 7,141.70 : x
  2. Step 2: Convert to fraction form
    21,181.97/31,771.23 = 7,141.70/x
  3. Step 3: Cross multiply
    21,181.97x = 31,771.23 × 7,141.70
  4. Step 4: Simplify right side
    21,181.97x = 226,900,593.29
  5. Step 5: Solve for x
    x = 226,900,593.29/21,181.97
  6. Step 6: Final answer
    x = 10,711.97

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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.