Home / 13,690.44-18,891.67-7,723.57

Finding the Fourth Proportional to 13,690.44, 18,891.67 and 7,723.57

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Solution

The fourth proportional to 13,690.44, 18,891.67 and 7,723.57 is: 10,657.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.44 : 18,891.67 = 7,723.57 : x
  2. Step 2: Convert to fraction form
    13,690.44/18,891.67 = 7,723.57/x
  3. Step 3: Cross multiply
    13,690.44x = 18,891.67 × 7,723.57
  4. Step 4: Simplify right side
    13,690.44x = 145,911,135.66
  5. Step 5: Solve for x
    x = 145,911,135.66/13,690.44
  6. Step 6: Final answer
    x = 10,657.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.