Home / 18,378.25-25,364.81-10,418.78

Finding the Fourth Proportional to 18,378.25, 25,364.81 and 10,418.78

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Solution

The fourth proportional to 18,378.25, 25,364.81 and 10,418.78 is: 14,379.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.25 : 25,364.81 = 10,418.78 : x
  2. Step 2: Convert to fraction form
    18,378.25/25,364.81 = 10,418.78/x
  3. Step 3: Cross multiply
    18,378.25x = 25,364.81 × 10,418.78
  4. Step 4: Simplify right side
    18,378.25x = 264,270,464.59
  5. Step 5: Solve for x
    x = 264,270,464.59/18,378.25
  6. Step 6: Final answer
    x = 14,379.52

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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.