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Finding the Fourth Proportional to 13,424.10, 20,144.07 and 5,111.11

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Solution

The fourth proportional to 13,424.10, 20,144.07 and 5,111.11 is: 7,669.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.10 : 20,144.07 = 5,111.11 : x
  2. Step 2: Convert to fraction form
    13,424.10/20,144.07 = 5,111.11/x
  3. Step 3: Cross multiply
    13,424.10x = 20,144.07 × 5,111.11
  4. Step 4: Simplify right side
    13,424.10x = 102,958,557.62
  5. Step 5: Solve for x
    x = 102,958,557.62/13,424.10
  6. Step 6: Final answer
    x = 7,669.68

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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.