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Finding the Fourth Proportional to 13,711.88, 18,922.21 and 7,424.26

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Solution

The fourth proportional to 13,711.88, 18,922.21 and 7,424.26 is: 10,245.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.88 : 18,922.21 = 7,424.26 : x
  2. Step 2: Convert to fraction form
    13,711.88/18,922.21 = 7,424.26/x
  3. Step 3: Cross multiply
    13,711.88x = 18,922.21 × 7,424.26
  4. Step 4: Simplify right side
    13,711.88x = 140,483,340.95
  5. Step 5: Solve for x
    x = 140,483,340.95/13,711.88
  6. Step 6: Final answer
    x = 10,245.37

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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.