Home / 13,418.94-18,518.26-8,117.30

Finding the Fourth Proportional to 13,418.94, 18,518.26 and 8,117.30

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Solution

The fourth proportional to 13,418.94, 18,518.26 and 8,117.30 is: 11,201.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.94 : 18,518.26 = 8,117.30 : x
  2. Step 2: Convert to fraction form
    13,418.94/18,518.26 = 8,117.30/x
  3. Step 3: Cross multiply
    13,418.94x = 18,518.26 × 8,117.30
  4. Step 4: Simplify right side
    13,418.94x = 150,318,271.90
  5. Step 5: Solve for x
    x = 150,318,271.90/13,418.94
  6. Step 6: Final answer
    x = 11,201.95

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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.