Home / 13,420.13-20,123.35-5,093.81

Finding the Fourth Proportional to 13,420.13, 20,123.35 and 5,093.81

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Solution

The fourth proportional to 13,420.13, 20,123.35 and 5,093.81 is: 7,638.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.13 : 20,123.35 = 5,093.81 : x
  2. Step 2: Convert to fraction form
    13,420.13/20,123.35 = 5,093.81/x
  3. Step 3: Cross multiply
    13,420.13x = 20,123.35 × 5,093.81
  4. Step 4: Simplify right side
    13,420.13x = 102,504,408.11
  5. Step 5: Solve for x
    x = 102,504,408.11/13,420.13
  6. Step 6: Final answer
    x = 7,638.11

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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.