Home / 13,914.12-20,869.92-5,147.40

Finding the Fourth Proportional to 13,914.12, 20,869.92 and 5,147.40

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Solution

The fourth proportional to 13,914.12, 20,869.92 and 5,147.40 is: 7,720.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,914.12 : 20,869.92 = 5,147.40 : x
  2. Step 2: Convert to fraction form
    13,914.12/20,869.92 = 5,147.40/x
  3. Step 3: Cross multiply
    13,914.12x = 20,869.92 × 5,147.40
  4. Step 4: Simplify right side
    13,914.12x = 107,425,826.21
  5. Step 5: Solve for x
    x = 107,425,826.21/13,914.12
  6. Step 6: Final answer
    x = 7,720.63

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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.