Home / 31,841.28-43,929.60-21,888

Finding the Fourth Proportional to 31,841.28, 43,929.60 and 21,888

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Solution

The fourth proportional to 31,841.28, 43,929.60 and 21,888 is: 30,197.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,841.28 : 43,929.60 = 21,888 : x
  2. Step 2: Convert to fraction form
    31,841.28/43,929.60 = 21,888/x
  3. Step 3: Cross multiply
    31,841.28x = 43,929.60 × 21,888
  4. Step 4: Simplify right side
    31,841.28x = 961,531,084.80
  5. Step 5: Solve for x
    x = 961,531,084.80/31,841.28
  6. Step 6: Final answer
    x = 30,197.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.