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Finding the Fourth Proportional to 13,392.63, 20,086.20 and 5,069.78

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Solution

The fourth proportional to 13,392.63, 20,086.20 and 5,069.78 is: 7,603.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,392.63 : 20,086.20 = 5,069.78 : x
  2. Step 2: Convert to fraction form
    13,392.63/20,086.20 = 5,069.78/x
  3. Step 3: Cross multiply
    13,392.63x = 20,086.20 × 5,069.78
  4. Step 4: Simplify right side
    13,392.63x = 101,832,514.61
  5. Step 5: Solve for x
    x = 101,832,514.61/13,392.63
  6. Step 6: Final answer
    x = 7,603.62

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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.