Home / 13,499.87-20,124.65-13,286.63

Finding the Fourth Proportional to 13,499.87, 20,124.65 and 13,286.63

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Solution

The fourth proportional to 13,499.87, 20,124.65 and 13,286.63 is: 19,806.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,499.87 : 20,124.65 = 13,286.63 : x
  2. Step 2: Convert to fraction form
    13,499.87/20,124.65 = 13,286.63/x
  3. Step 3: Cross multiply
    13,499.87x = 20,124.65 × 13,286.63
  4. Step 4: Simplify right side
    13,499.87x = 267,388,861.96
  5. Step 5: Solve for x
    x = 267,388,861.96/13,499.87
  6. Step 6: Final answer
    x = 19,806.78

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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.