Home / 21,329.25-31,980.19-8,857.89

Finding the Fourth Proportional to 21,329.25, 31,980.19 and 8,857.89

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Solution

The fourth proportional to 21,329.25, 31,980.19 and 8,857.89 is: 13,281.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.25 : 31,980.19 = 8,857.89 : x
  2. Step 2: Convert to fraction form
    21,329.25/31,980.19 = 8,857.89/x
  3. Step 3: Cross multiply
    21,329.25x = 31,980.19 × 8,857.89
  4. Step 4: Simplify right side
    21,329.25x = 283,277,005.20
  5. Step 5: Solve for x
    x = 283,277,005.20/21,329.25
  6. Step 6: Final answer
    x = 13,281.15

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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.