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Finding the Fourth Proportional to 13,401.70, 20,102.55 and 13,171.30

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Solution

The fourth proportional to 13,401.70, 20,102.55 and 13,171.30 is: 19,756.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,401.70 : 20,102.55 = 13,171.30 : x
  2. Step 2: Convert to fraction form
    13,401.70/20,102.55 = 13,171.30/x
  3. Step 3: Cross multiply
    13,401.70x = 20,102.55 × 13,171.30
  4. Step 4: Simplify right side
    13,401.70x = 264,776,716.82
  5. Step 5: Solve for x
    x = 264,776,716.82/13,401.70
  6. Step 6: Final answer
    x = 19,756.95

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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.