Home / 20,813.92-28,723.91-11,382.49

Finding the Fourth Proportional to 20,813.92, 28,723.91 and 11,382.49

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Solution

The fourth proportional to 20,813.92, 28,723.91 and 11,382.49 is: 15,708.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.92 : 28,723.91 = 11,382.49 : x
  2. Step 2: Convert to fraction form
    20,813.92/28,723.91 = 11,382.49/x
  3. Step 3: Cross multiply
    20,813.92x = 28,723.91 × 11,382.49
  4. Step 4: Simplify right side
    20,813.92x = 326,949,618.34
  5. Step 5: Solve for x
    x = 326,949,618.34/20,813.92
  6. Step 6: Final answer
    x = 15,708.22

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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.