Home / 13,614.25-20,421.39-5,406.25

Finding the Fourth Proportional to 13,614.25, 20,421.39 and 5,406.25

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Solution

The fourth proportional to 13,614.25, 20,421.39 and 5,406.25 is: 8,109.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,614.25 : 20,421.39 = 5,406.25 : x
  2. Step 2: Convert to fraction form
    13,614.25/20,421.39 = 5,406.25/x
  3. Step 3: Cross multiply
    13,614.25x = 20,421.39 × 5,406.25
  4. Step 4: Simplify right side
    13,614.25x = 110,403,139.69
  5. Step 5: Solve for x
    x = 110,403,139.69/13,614.25
  6. Step 6: Final answer
    x = 8,109.38

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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.