Home / 21,330.25-31,981.69-8,858.89

Finding the Fourth Proportional to 21,330.25, 31,981.69 and 8,858.89

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Solution

The fourth proportional to 21,330.25, 31,981.69 and 8,858.89 is: 13,282.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.25 : 31,981.69 = 8,858.89 : x
  2. Step 2: Convert to fraction form
    21,330.25/31,981.69 = 8,858.89/x
  3. Step 3: Cross multiply
    21,330.25x = 31,981.69 × 8,858.89
  4. Step 4: Simplify right side
    21,330.25x = 283,322,273.72
  5. Step 5: Solve for x
    x = 283,322,273.72/21,330.25
  6. Step 6: Final answer
    x = 13,282.65

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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.