Home / 31,815.81-43,918.07-21,201.57

Finding the Fourth Proportional to 31,815.81, 43,918.07 and 21,201.57

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Solution

The fourth proportional to 31,815.81, 43,918.07 and 21,201.57 is: 29,266.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,815.81 : 43,918.07 = 21,201.57 : x
  2. Step 2: Convert to fraction form
    31,815.81/43,918.07 = 21,201.57/x
  3. Step 3: Cross multiply
    31,815.81x = 43,918.07 × 21,201.57
  4. Step 4: Simplify right side
    31,815.81x = 931,131,929.36
  5. Step 5: Solve for x
    x = 931,131,929.36/31,815.81
  6. Step 6: Final answer
    x = 29,266.33

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1.5x scale

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.