Home / 20,805.95-28,709.07-11,730.92

Finding the Fourth Proportional to 20,805.95, 28,709.07 and 11,730.92

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Solution

The fourth proportional to 20,805.95, 28,709.07 and 11,730.92 is: 16,186.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.95 : 28,709.07 = 11,730.92 : x
  2. Step 2: Convert to fraction form
    20,805.95/28,709.07 = 11,730.92/x
  3. Step 3: Cross multiply
    20,805.95x = 28,709.07 × 11,730.92
  4. Step 4: Simplify right side
    20,805.95x = 336,783,659.90
  5. Step 5: Solve for x
    x = 336,783,659.90/20,805.95
  6. Step 6: Final answer
    x = 16,186.90

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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.