Home / 21,500.78-29,672.93-11,942.51

Finding the Fourth Proportional to 21,500.78, 29,672.93 and 11,942.51

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Solution

The fourth proportional to 21,500.78, 29,672.93 and 11,942.51 is: 16,481.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,500.78 : 29,672.93 = 11,942.51 : x
  2. Step 2: Convert to fraction form
    21,500.78/29,672.93 = 11,942.51/x
  3. Step 3: Cross multiply
    21,500.78x = 29,672.93 × 11,942.51
  4. Step 4: Simplify right side
    21,500.78x = 354,369,144.75
  5. Step 5: Solve for x
    x = 354,369,144.75/21,500.78
  6. Step 6: Final answer
    x = 16,481.69

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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.