Home / 21,731.68-29,989.38-11,795.68

Finding the Fourth Proportional to 21,731.68, 29,989.38 and 11,795.68

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Solution

The fourth proportional to 21,731.68, 29,989.38 and 11,795.68 is: 16,277.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.68 : 29,989.38 = 11,795.68 : x
  2. Step 2: Convert to fraction form
    21,731.68/29,989.38 = 11,795.68/x
  3. Step 3: Cross multiply
    21,731.68x = 29,989.38 × 11,795.68
  4. Step 4: Simplify right side
    21,731.68x = 353,745,129.88
  5. Step 5: Solve for x
    x = 353,745,129.88/21,731.68
  6. Step 6: Final answer
    x = 16,277.85

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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.