Home / 20,862.31-31,107.36-18,544.09

Finding the Fourth Proportional to 20,862.31, 31,107.36 and 18,544.09

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Solution

The fourth proportional to 20,862.31, 31,107.36 and 18,544.09 is: 27,650.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.31 : 31,107.36 = 18,544.09 : x
  2. Step 2: Convert to fraction form
    20,862.31/31,107.36 = 18,544.09/x
  3. Step 3: Cross multiply
    20,862.31x = 31,107.36 × 18,544.09
  4. Step 4: Simplify right side
    20,862.31x = 576,857,683.50
  5. Step 5: Solve for x
    x = 576,857,683.50/20,862.31
  6. Step 6: Final answer
    x = 27,650.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.