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Finding the Fourth Proportional to 13,917.22, 20,838.47 and 10,885.19

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Solution

The fourth proportional to 13,917.22, 20,838.47 and 10,885.19 is: 16,298.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,917.22 : 20,838.47 = 10,885.19 : x
  2. Step 2: Convert to fraction form
    13,917.22/20,838.47 = 10,885.19/x
  3. Step 3: Cross multiply
    13,917.22x = 20,838.47 × 10,885.19
  4. Step 4: Simplify right side
    13,917.22x = 226,830,546.64
  5. Step 5: Solve for x
    x = 226,830,546.64/13,917.22
  6. Step 6: Final answer
    x = 16,298.56

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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.