Home / 12,687.31-19,032.79-3,922.91

Finding the Fourth Proportional to 12,687.31, 19,032.79 and 3,922.91

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Solution

The fourth proportional to 12,687.31, 19,032.79 and 3,922.91 is: 5,884.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.31 : 19,032.79 = 3,922.91 : x
  2. Step 2: Convert to fraction form
    12,687.31/19,032.79 = 3,922.91/x
  3. Step 3: Cross multiply
    12,687.31x = 19,032.79 × 3,922.91
  4. Step 4: Simplify right side
    12,687.31x = 74,663,922.22
  5. Step 5: Solve for x
    x = 74,663,922.22/12,687.31
  6. Step 6: Final answer
    x = 5,884.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.