Home / 20,619.15-28,454.33-11,187.71

Finding the Fourth Proportional to 20,619.15, 28,454.33 and 11,187.71

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Solution

The fourth proportional to 20,619.15, 28,454.33 and 11,187.71 is: 15,438.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.15 : 28,454.33 = 11,187.71 : x
  2. Step 2: Convert to fraction form
    20,619.15/28,454.33 = 11,187.71/x
  3. Step 3: Cross multiply
    20,619.15x = 28,454.33 × 11,187.71
  4. Step 4: Simplify right side
    20,619.15x = 318,338,786.05
  5. Step 5: Solve for x
    x = 318,338,786.05/20,619.15
  6. Step 6: Final answer
    x = 15,438.99

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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.