Home / 20,906.40-28,848.66-11,832.78

Finding the Fourth Proportional to 20,906.40, 28,848.66 and 11,832.78

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Solution

The fourth proportional to 20,906.40, 28,848.66 and 11,832.78 is: 16,328.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.40 : 28,848.66 = 11,832.78 : x
  2. Step 2: Convert to fraction form
    20,906.40/28,848.66 = 11,832.78/x
  3. Step 3: Cross multiply
    20,906.40x = 28,848.66 × 11,832.78
  4. Step 4: Simplify right side
    20,906.40x = 341,359,847.07
  5. Step 5: Solve for x
    x = 341,359,847.07/20,906.40
  6. Step 6: Final answer
    x = 16,328.01

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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.