Home / 21,231.72-31,828.68-10,688.04

Finding the Fourth Proportional to 21,231.72, 31,828.68 and 10,688.04

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Solution

The fourth proportional to 21,231.72, 31,828.68 and 10,688.04 is: 16,022.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.72 : 31,828.68 = 10,688.04 : x
  2. Step 2: Convert to fraction form
    21,231.72/31,828.68 = 10,688.04/x
  3. Step 3: Cross multiply
    21,231.72x = 31,828.68 × 10,688.04
  4. Step 4: Simplify right side
    21,231.72x = 340,186,204.99
  5. Step 5: Solve for x
    x = 340,186,204.99/21,231.72
  6. Step 6: Final answer
    x = 16,022.55

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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.