Home / 20,911.96-28,856.72-11,958.02

Finding the Fourth Proportional to 20,911.96, 28,856.72 and 11,958.02

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Solution

The fourth proportional to 20,911.96, 28,856.72 and 11,958.02 is: 16,501.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.96 : 28,856.72 = 11,958.02 : x
  2. Step 2: Convert to fraction form
    20,911.96/28,856.72 = 11,958.02/x
  3. Step 3: Cross multiply
    20,911.96x = 28,856.72 × 11,958.02
  4. Step 4: Simplify right side
    20,911.96x = 345,069,234.89
  5. Step 5: Solve for x
    x = 345,069,234.89/20,911.96
  6. Step 6: Final answer
    x = 16,501.05

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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.