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Finding the Fourth Proportional to 13,187.66, 18,198.98 and 7,219.33

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Solution

The fourth proportional to 13,187.66, 18,198.98 and 7,219.33 is: 9,962.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.66 : 18,198.98 = 7,219.33 : x
  2. Step 2: Convert to fraction form
    13,187.66/18,198.98 = 7,219.33/x
  3. Step 3: Cross multiply
    13,187.66x = 18,198.98 × 7,219.33
  4. Step 4: Simplify right side
    13,187.66x = 131,384,387.76
  5. Step 5: Solve for x
    x = 131,384,387.76/13,187.66
  6. Step 6: Final answer
    x = 9,962.68

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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.