Home / 20,920.43-28,863.07-13,371.12

Finding the Fourth Proportional to 20,920.43, 28,863.07 and 13,371.12

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Solution

The fourth proportional to 20,920.43, 28,863.07 and 13,371.12 is: 18,447.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.43 : 28,863.07 = 13,371.12 : x
  2. Step 2: Convert to fraction form
    20,920.43/28,863.07 = 13,371.12/x
  3. Step 3: Cross multiply
    20,920.43x = 28,863.07 × 13,371.12
  4. Step 4: Simplify right side
    20,920.43x = 385,931,505.68
  5. Step 5: Solve for x
    x = 385,931,505.68/20,920.43
  6. Step 6: Final answer
    x = 18,447.59

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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.