Home / 18,680.51-25,765.92-11,120.99

Finding the Fourth Proportional to 18,680.51, 25,765.92 and 11,120.99

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Solution

The fourth proportional to 18,680.51, 25,765.92 and 11,120.99 is: 15,339.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.51 : 25,765.92 = 11,120.99 : x
  2. Step 2: Convert to fraction form
    18,680.51/25,765.92 = 11,120.99/x
  3. Step 3: Cross multiply
    18,680.51x = 25,765.92 × 11,120.99
  4. Step 4: Simplify right side
    18,680.51x = 286,542,409.83
  5. Step 5: Solve for x
    x = 286,542,409.83/18,680.51
  6. Step 6: Final answer
    x = 15,339.11

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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.