Home / 20,645.81-28,504.01-18,517.59

Finding the Fourth Proportional to 20,645.81, 28,504.01 and 18,517.59

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Solution

The fourth proportional to 20,645.81, 28,504.01 and 18,517.59 is: 25,565.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.81 : 28,504.01 = 18,517.59 : x
  2. Step 2: Convert to fraction form
    20,645.81/28,504.01 = 18,517.59/x
  3. Step 3: Cross multiply
    20,645.81x = 28,504.01 × 18,517.59
  4. Step 4: Simplify right side
    20,645.81x = 527,825,562.70
  5. Step 5: Solve for x
    x = 527,825,562.70/20,645.81
  6. Step 6: Final answer
    x = 25,565.75

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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.