Home / 13,319.68-18,458.87-13,131.76

Finding the Fourth Proportional to 13,319.68, 18,458.87 and 13,131.76

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Solution

The fourth proportional to 13,319.68, 18,458.87 and 13,131.76 is: 18,198.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.68 : 18,458.87 = 13,131.76 : x
  2. Step 2: Convert to fraction form
    13,319.68/18,458.87 = 13,131.76/x
  3. Step 3: Cross multiply
    13,319.68x = 18,458.87 × 13,131.76
  4. Step 4: Simplify right side
    13,319.68x = 242,397,450.71
  5. Step 5: Solve for x
    x = 242,397,450.71/13,319.68
  6. Step 6: Final answer
    x = 18,198.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.