Home / 13,183.50-18,192.36-7,878.39

Finding the Fourth Proportional to 13,183.50, 18,192.36 and 7,878.39

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Solution

The fourth proportional to 13,183.50, 18,192.36 and 7,878.39 is: 10,871.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,183.50 : 18,192.36 = 7,878.39 : x
  2. Step 2: Convert to fraction form
    13,183.50/18,192.36 = 7,878.39/x
  3. Step 3: Cross multiply
    13,183.50x = 18,192.36 × 7,878.39
  4. Step 4: Simplify right side
    13,183.50x = 143,326,507.10
  5. Step 5: Solve for x
    x = 143,326,507.10/13,183.50
  6. Step 6: Final answer
    x = 10,871.66

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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.