Home / 18,255.78-25,193.51-11,178.20

Finding the Fourth Proportional to 18,255.78, 25,193.51 and 11,178.20

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Solution

The fourth proportional to 18,255.78, 25,193.51 and 11,178.20 is: 15,426.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,255.78 : 25,193.51 = 11,178.20 : x
  2. Step 2: Convert to fraction form
    18,255.78/25,193.51 = 11,178.20/x
  3. Step 3: Cross multiply
    18,255.78x = 25,193.51 × 11,178.20
  4. Step 4: Simplify right side
    18,255.78x = 281,617,911.62
  5. Step 5: Solve for x
    x = 281,617,911.62/18,255.78
  6. Step 6: Final answer
    x = 15,426.23

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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.