Home / 15,764.45-21,754.96-8,690.87

Finding the Fourth Proportional to 15,764.45, 21,754.96 and 8,690.87

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Solution

The fourth proportional to 15,764.45, 21,754.96 and 8,690.87 is: 11,993.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.45 : 21,754.96 = 8,690.87 : x
  2. Step 2: Convert to fraction form
    15,764.45/21,754.96 = 8,690.87/x
  3. Step 3: Cross multiply
    15,764.45x = 21,754.96 × 8,690.87
  4. Step 4: Simplify right side
    15,764.45x = 189,069,610.76
  5. Step 5: Solve for x
    x = 189,069,610.76/15,764.45
  6. Step 6: Final answer
    x = 11,993.42

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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.