Home / 20,402.56-28,156.94-11,906.72

Finding the Fourth Proportional to 20,402.56, 28,156.94 and 11,906.72

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Solution

The fourth proportional to 20,402.56, 28,156.94 and 11,906.72 is: 16,432.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.56 : 28,156.94 = 11,906.72 : x
  2. Step 2: Convert to fraction form
    20,402.56/28,156.94 = 11,906.72/x
  3. Step 3: Cross multiply
    20,402.56x = 28,156.94 × 11,906.72
  4. Step 4: Simplify right side
    20,402.56x = 335,256,800.64
  5. Step 5: Solve for x
    x = 335,256,800.64/20,402.56
  6. Step 6: Final answer
    x = 16,432.09

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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.