Home / 20,813.68-28,722.88-11,382.24

Finding the Fourth Proportional to 20,813.68, 28,722.88 and 11,382.24

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Solution

The fourth proportional to 20,813.68, 28,722.88 and 11,382.24 is: 15,707.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.68 : 28,722.88 = 11,382.24 : x
  2. Step 2: Convert to fraction form
    20,813.68/28,722.88 = 11,382.24/x
  3. Step 3: Cross multiply
    20,813.68x = 28,722.88 × 11,382.24
  4. Step 4: Simplify right side
    20,813.68x = 326,930,713.65
  5. Step 5: Solve for x
    x = 326,930,713.65/20,813.68
  6. Step 6: Final answer
    x = 15,707.49

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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.