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Finding the Fourth Proportional to 13,808.07, 20,712.11 and 3,419.82

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Solution

The fourth proportional to 13,808.07, 20,712.11 and 3,419.82 is: 5,129.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.07 : 20,712.11 = 3,419.82 : x
  2. Step 2: Convert to fraction form
    13,808.07/20,712.11 = 3,419.82/x
  3. Step 3: Cross multiply
    13,808.07x = 20,712.11 × 3,419.82
  4. Step 4: Simplify right side
    13,808.07x = 70,831,670.92
  5. Step 5: Solve for x
    x = 70,831,670.92/13,808.07
  6. Step 6: Final answer
    x = 5,129.73

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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.