Home / 15,765.71-21,755.75-9,797.31

Finding the Fourth Proportional to 15,765.71, 21,755.75 and 9,797.31

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Solution

The fourth proportional to 15,765.71, 21,755.75 and 9,797.31 is: 13,519.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.71 : 21,755.75 = 9,797.31 : x
  2. Step 2: Convert to fraction form
    15,765.71/21,755.75 = 9,797.31/x
  3. Step 3: Cross multiply
    15,765.71x = 21,755.75 × 9,797.31
  4. Step 4: Simplify right side
    15,765.71x = 213,147,778.05
  5. Step 5: Solve for x
    x = 213,147,778.05/15,765.71
  6. Step 6: Final answer
    x = 13,519.71

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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.