Home / 21,639.50-32,268.33-20,868.58

Finding the Fourth Proportional to 21,639.50, 32,268.33 and 20,868.58

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Solution

The fourth proportional to 21,639.50, 32,268.33 and 20,868.58 is: 31,118.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.50 : 32,268.33 = 20,868.58 : x
  2. Step 2: Convert to fraction form
    21,639.50/32,268.33 = 20,868.58/x
  3. Step 3: Cross multiply
    21,639.50x = 32,268.33 × 20,868.58
  4. Step 4: Simplify right side
    21,639.50x = 673,394,226.07
  5. Step 5: Solve for x
    x = 673,394,226.07/21,639.50
  6. Step 6: Final answer
    x = 31,118.75

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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.