Home / 20,788.92-28,689.39-11,715.84

Finding the Fourth Proportional to 20,788.92, 28,689.39 and 11,715.84

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Solution

The fourth proportional to 20,788.92, 28,689.39 and 11,715.84 is: 16,168.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.92 : 28,689.39 = 11,715.84 : x
  2. Step 2: Convert to fraction form
    20,788.92/28,689.39 = 11,715.84/x
  3. Step 3: Cross multiply
    20,788.92x = 28,689.39 × 11,715.84
  4. Step 4: Simplify right side
    20,788.92x = 336,120,302.94
  5. Step 5: Solve for x
    x = 336,120,302.94/20,788.92
  6. Step 6: Final answer
    x = 16,168.24

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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.