Home / 13,836.72-20,666.82-12,518.43

Finding the Fourth Proportional to 13,836.72, 20,666.82 and 12,518.43

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Solution

The fourth proportional to 13,836.72, 20,666.82 and 12,518.43 is: 18,697.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,836.72 : 20,666.82 = 12,518.43 : x
  2. Step 2: Convert to fraction form
    13,836.72/20,666.82 = 12,518.43/x
  3. Step 3: Cross multiply
    13,836.72x = 20,666.82 × 12,518.43
  4. Step 4: Simplify right side
    13,836.72x = 258,716,139.49
  5. Step 5: Solve for x
    x = 258,716,139.49/13,836.72
  6. Step 6: Final answer
    x = 18,697.79

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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.