Home / 18,111.87-25,005.11-11,403.25

Finding the Fourth Proportional to 18,111.87, 25,005.11 and 11,403.25

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Solution

The fourth proportional to 18,111.87, 25,005.11 and 11,403.25 is: 15,743.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,111.87 : 25,005.11 = 11,403.25 : x
  2. Step 2: Convert to fraction form
    18,111.87/25,005.11 = 11,403.25/x
  3. Step 3: Cross multiply
    18,111.87x = 25,005.11 × 11,403.25
  4. Step 4: Simplify right side
    18,111.87x = 285,139,401.08
  5. Step 5: Solve for x
    x = 285,139,401.08/18,111.87
  6. Step 6: Final answer
    x = 15,743.23

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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.