Home / 21,322.09-31,982.91-7,281.96

Finding the Fourth Proportional to 21,322.09, 31,982.91 and 7,281.96

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Solution

The fourth proportional to 21,322.09, 31,982.91 and 7,281.96 is: 10,922.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.09 : 31,982.91 = 7,281.96 : x
  2. Step 2: Convert to fraction form
    21,322.09/31,982.91 = 7,281.96/x
  3. Step 3: Cross multiply
    21,322.09x = 31,982.91 × 7,281.96
  4. Step 4: Simplify right side
    21,322.09x = 232,898,271.30
  5. Step 5: Solve for x
    x = 232,898,271.30/21,322.09
  6. Step 6: Final answer
    x = 10,922.86

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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.