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Finding the Fourth Proportional to 13,919.88, 20,842.14 and 10,193.88

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Solution

The fourth proportional to 13,919.88, 20,842.14 and 10,193.88 is: 15,263.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.88 : 20,842.14 = 10,193.88 : x
  2. Step 2: Convert to fraction form
    13,919.88/20,842.14 = 10,193.88/x
  3. Step 3: Cross multiply
    13,919.88x = 20,842.14 × 10,193.88
  4. Step 4: Simplify right side
    13,919.88x = 212,462,274.10
  5. Step 5: Solve for x
    x = 212,462,274.10/13,919.88
  6. Step 6: Final answer
    x = 15,263.23

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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.