Home / 20,830.08-28,746.78-11,879.31

Finding the Fourth Proportional to 20,830.08, 28,746.78 and 11,879.31

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Solution

The fourth proportional to 20,830.08, 28,746.78 and 11,879.31 is: 16,394.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.08 : 28,746.78 = 11,879.31 : x
  2. Step 2: Convert to fraction form
    20,830.08/28,746.78 = 11,879.31/x
  3. Step 3: Cross multiply
    20,830.08x = 28,746.78 × 11,879.31
  4. Step 4: Simplify right side
    20,830.08x = 341,491,911.12
  5. Step 5: Solve for x
    x = 341,491,911.12/20,830.08
  6. Step 6: Final answer
    x = 16,394.17

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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.