Home / 20,955.16-28,923.60-12,992.86

Finding the Fourth Proportional to 20,955.16, 28,923.60 and 12,992.86

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Solution

The fourth proportional to 20,955.16, 28,923.60 and 12,992.86 is: 17,933.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.16 : 28,923.60 = 12,992.86 : x
  2. Step 2: Convert to fraction form
    20,955.16/28,923.60 = 12,992.86/x
  3. Step 3: Cross multiply
    20,955.16x = 28,923.60 × 12,992.86
  4. Step 4: Simplify right side
    20,955.16x = 375,800,285.50
  5. Step 5: Solve for x
    x = 375,800,285.50/20,955.16
  6. Step 6: Final answer
    x = 17,933.54

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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.