Home / 13,429.12-20,143.68-5,107.16

Finding the Fourth Proportional to 13,429.12, 20,143.68 and 5,107.16

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Solution

The fourth proportional to 13,429.12, 20,143.68 and 5,107.16 is: 7,660.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,429.12 : 20,143.68 = 5,107.16 : x
  2. Step 2: Convert to fraction form
    13,429.12/20,143.68 = 5,107.16/x
  3. Step 3: Cross multiply
    13,429.12x = 20,143.68 × 5,107.16
  4. Step 4: Simplify right side
    13,429.12x = 102,876,996.75
  5. Step 5: Solve for x
    x = 102,876,996.75/13,429.12
  6. Step 6: Final answer
    x = 7,660.74

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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.