Home / 13,910.88-20,742.21-12,365.40

Finding the Fourth Proportional to 13,910.88, 20,742.21 and 12,365.40

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Solution

The fourth proportional to 13,910.88, 20,742.21 and 12,365.40 is: 18,437.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,910.88 : 20,742.21 = 12,365.40 : x
  2. Step 2: Convert to fraction form
    13,910.88/20,742.21 = 12,365.40/x
  3. Step 3: Cross multiply
    13,910.88x = 20,742.21 × 12,365.40
  4. Step 4: Simplify right side
    13,910.88x = 256,485,723.53
  5. Step 5: Solve for x
    x = 256,485,723.53/13,910.88
  6. Step 6: Final answer
    x = 18,437.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.