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Finding the Fourth Proportional to 13,904.18, 20,835.33 and 8,351.42

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Solution

The fourth proportional to 13,904.18, 20,835.33 and 8,351.42 is: 12,514.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,904.18 : 20,835.33 = 8,351.42 : x
  2. Step 2: Convert to fraction form
    13,904.18/20,835.33 = 8,351.42/x
  3. Step 3: Cross multiply
    13,904.18x = 20,835.33 × 8,351.42
  4. Step 4: Simplify right side
    13,904.18x = 174,004,591.67
  5. Step 5: Solve for x
    x = 174,004,591.67/13,904.18
  6. Step 6: Final answer
    x = 12,514.55

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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.