Home / 13,770.28-20,655.37-3,909.56

Finding the Fourth Proportional to 13,770.28, 20,655.37 and 3,909.56

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Solution

The fourth proportional to 13,770.28, 20,655.37 and 3,909.56 is: 5,864.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,770.28 : 20,655.37 = 3,909.56 : x
  2. Step 2: Convert to fraction form
    13,770.28/20,655.37 = 3,909.56/x
  3. Step 3: Cross multiply
    13,770.28x = 20,655.37 × 3,909.56
  4. Step 4: Simplify right side
    13,770.28x = 80,753,426.13
  5. Step 5: Solve for x
    x = 80,753,426.13/13,770.28
  6. Step 6: Final answer
    x = 5,864.33

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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.