Home / 13,187.72-18,199.10-7,219.94

Finding the Fourth Proportional to 13,187.72, 18,199.10 and 7,219.94

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Solution

The fourth proportional to 13,187.72, 18,199.10 and 7,219.94 is: 9,963.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.72 : 18,199.10 = 7,219.94 : x
  2. Step 2: Convert to fraction form
    13,187.72/18,199.10 = 7,219.94/x
  3. Step 3: Cross multiply
    13,187.72x = 18,199.10 × 7,219.94
  4. Step 4: Simplify right side
    13,187.72x = 131,396,473.60
  5. Step 5: Solve for x
    x = 131,396,473.60/13,187.72
  6. Step 6: Final answer
    x = 9,963.55

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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.