Home / 18,390.06-25,378.86-11,320.56

Finding the Fourth Proportional to 18,390.06, 25,378.86 and 11,320.56

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Solution

The fourth proportional to 18,390.06, 25,378.86 and 11,320.56 is: 15,622.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.06 : 25,378.86 = 11,320.56 : x
  2. Step 2: Convert to fraction form
    18,390.06/25,378.86 = 11,320.56/x
  3. Step 3: Cross multiply
    18,390.06x = 25,378.86 × 11,320.56
  4. Step 4: Simplify right side
    18,390.06x = 287,302,907.36
  5. Step 5: Solve for x
    x = 287,302,907.36/18,390.06
  6. Step 6: Final answer
    x = 15,622.73

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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.