Home / 13,418.87-18,517.82-8,113.77

Finding the Fourth Proportional to 13,418.87, 18,517.82 and 8,113.77

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Solution

The fourth proportional to 13,418.87, 18,517.82 and 8,113.77 is: 11,196.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.87 : 18,517.82 = 8,113.77 : x
  2. Step 2: Convert to fraction form
    13,418.87/18,517.82 = 8,113.77/x
  3. Step 3: Cross multiply
    13,418.87x = 18,517.82 × 8,113.77
  4. Step 4: Simplify right side
    13,418.87x = 150,249,291.81
  5. Step 5: Solve for x
    x = 150,249,291.81/13,418.87
  6. Step 6: Final answer
    x = 11,196.87

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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.