Home / 13,421.02-18,518.03-8,115.73

Finding the Fourth Proportional to 13,421.02, 18,518.03 and 8,115.73

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Solution

The fourth proportional to 13,421.02, 18,518.03 and 8,115.73 is: 11,197.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.02 : 18,518.03 = 8,115.73 : x
  2. Step 2: Convert to fraction form
    13,421.02/18,518.03 = 8,115.73/x
  3. Step 3: Cross multiply
    13,421.02x = 18,518.03 × 8,115.73
  4. Step 4: Simplify right side
    13,421.02x = 150,287,198.44
  5. Step 5: Solve for x
    x = 150,287,198.44/13,421.02
  6. Step 6: Final answer
    x = 11,197.90

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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.