Home / 15,764.31-21,755.75-8,690.73

Finding the Fourth Proportional to 15,764.31, 21,755.75 and 8,690.73

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Solution

The fourth proportional to 15,764.31, 21,755.75 and 8,690.73 is: 11,993.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.31 : 21,755.75 = 8,690.73 : x
  2. Step 2: Convert to fraction form
    15,764.31/21,755.75 = 8,690.73/x
  3. Step 3: Cross multiply
    15,764.31x = 21,755.75 × 8,690.73
  4. Step 4: Simplify right side
    15,764.31x = 189,073,305.74
  5. Step 5: Solve for x
    x = 189,073,305.74/15,764.31
  6. Step 6: Final answer
    x = 11,993.76

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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.