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Finding the Fourth Proportional to 11,221.70, 16,832.55 and 10,978.70

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Solution

The fourth proportional to 11,221.70, 16,832.55 and 10,978.70 is: 16,468.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,221.70 : 16,832.55 = 10,978.70 : x
  2. Step 2: Convert to fraction form
    11,221.70/16,832.55 = 10,978.70/x
  3. Step 3: Cross multiply
    11,221.70x = 16,832.55 × 10,978.70
  4. Step 4: Simplify right side
    11,221.70x = 184,799,516.69
  5. Step 5: Solve for x
    x = 184,799,516.69/11,221.70
  6. Step 6: Final answer
    x = 16,468.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.