Home / 20,911.38-28,863.23-12,949.08

Finding the Fourth Proportional to 20,911.38, 28,863.23 and 12,949.08

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Solution

The fourth proportional to 20,911.38, 28,863.23 and 12,949.08 is: 17,873.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.38 : 28,863.23 = 12,949.08 : x
  2. Step 2: Convert to fraction form
    20,911.38/28,863.23 = 12,949.08/x
  3. Step 3: Cross multiply
    20,911.38x = 28,863.23 × 12,949.08
  4. Step 4: Simplify right side
    20,911.38x = 373,752,209.58
  5. Step 5: Solve for x
    x = 373,752,209.58/20,911.38
  6. Step 6: Final answer
    x = 17,873.15

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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.