Home / 10,185.78-15,278.70-3,608.40

Finding the Fourth Proportional to 10,185.78, 15,278.70 and 3,608.40

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Solution

The fourth proportional to 10,185.78, 15,278.70 and 3,608.40 is: 5,412.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,185.78 : 15,278.70 = 3,608.40 : x
  2. Step 2: Convert to fraction form
    10,185.78/15,278.70 = 3,608.40/x
  3. Step 3: Cross multiply
    10,185.78x = 15,278.70 × 3,608.40
  4. Step 4: Simplify right side
    10,185.78x = 55,131,661.08
  5. Step 5: Solve for x
    x = 55,131,661.08/10,185.78
  6. Step 6: Final answer
    x = 5,412.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.