Home / 13,118.34-18,103.50-7,149.99

Finding the Fourth Proportional to 13,118.34, 18,103.50 and 7,149.99

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Solution

The fourth proportional to 13,118.34, 18,103.50 and 7,149.99 is: 9,867.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.34 : 18,103.50 = 7,149.99 : x
  2. Step 2: Convert to fraction form
    13,118.34/18,103.50 = 7,149.99/x
  3. Step 3: Cross multiply
    13,118.34x = 18,103.50 × 7,149.99
  4. Step 4: Simplify right side
    13,118.34x = 129,439,843.97
  5. Step 5: Solve for x
    x = 129,439,843.97/13,118.34
  6. Step 6: Final answer
    x = 9,867.09

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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.