Home / 21,216.39-31,805.70-10,672.62

Finding the Fourth Proportional to 21,216.39, 31,805.70 and 10,672.62

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Solution

The fourth proportional to 21,216.39, 31,805.70 and 10,672.62 is: 15,999.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.39 : 31,805.70 = 10,672.62 : x
  2. Step 2: Convert to fraction form
    21,216.39/31,805.70 = 10,672.62/x
  3. Step 3: Cross multiply
    21,216.39x = 31,805.70 × 10,672.62
  4. Step 4: Simplify right side
    21,216.39x = 339,450,149.93
  5. Step 5: Solve for x
    x = 339,450,149.93/21,216.39
  6. Step 6: Final answer
    x = 15,999.43

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1.5x scale

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.