Home / 21,214.68-31,821.03-8,731.59

Finding the Fourth Proportional to 21,214.68, 31,821.03 and 8,731.59

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Solution

The fourth proportional to 21,214.68, 31,821.03 and 8,731.59 is: 13,096.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.68 : 31,821.03 = 8,731.59 : x
  2. Step 2: Convert to fraction form
    21,214.68/31,821.03 = 8,731.59/x
  3. Step 3: Cross multiply
    21,214.68x = 31,821.03 × 8,731.59
  4. Step 4: Simplify right side
    21,214.68x = 277,848,187.34
  5. Step 5: Solve for x
    x = 277,848,187.34/21,214.68
  6. Step 6: Final answer
    x = 13,096.98

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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.