Home / 13,605.85-18,778.26-12,716.47

Finding the Fourth Proportional to 13,605.85, 18,778.26 and 12,716.47

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Solution

The fourth proportional to 13,605.85, 18,778.26 and 12,716.47 is: 17,550.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.85 : 18,778.26 = 12,716.47 : x
  2. Step 2: Convert to fraction form
    13,605.85/18,778.26 = 12,716.47/x
  3. Step 3: Cross multiply
    13,605.85x = 18,778.26 × 12,716.47
  4. Step 4: Simplify right side
    13,605.85x = 238,793,179.94
  5. Step 5: Solve for x
    x = 238,793,179.94/13,605.85
  6. Step 6: Final answer
    x = 17,550.77

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1.5x scale

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.