Home / 21,302.20-31,967.70-11,942.20

Finding the Fourth Proportional to 21,302.20, 31,967.70 and 11,942.20

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Solution

The fourth proportional to 21,302.20, 31,967.70 and 11,942.20 is: 17,921.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,302.20 : 31,967.70 = 11,942.20 : x
  2. Step 2: Convert to fraction form
    21,302.20/31,967.70 = 11,942.20/x
  3. Step 3: Cross multiply
    21,302.20x = 31,967.70 × 11,942.20
  4. Step 4: Simplify right side
    21,302.20x = 381,764,666.94
  5. Step 5: Solve for x
    x = 381,764,666.94/21,302.20
  6. Step 6: Final answer
    x = 17,921.37

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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.