Home / 18,940.20-26,154-11,878.80

Finding the Fourth Proportional to 18,940.20, 26,154 and 11,878.80

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Solution

The fourth proportional to 18,940.20, 26,154 and 11,878.80 is: 16,403.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.20 : 26,154 = 11,878.80 : x
  2. Step 2: Convert to fraction form
    18,940.20/26,154 = 11,878.80/x
  3. Step 3: Cross multiply
    18,940.20x = 26,154 × 11,878.80
  4. Step 4: Simplify right side
    18,940.20x = 310,678,135.20
  5. Step 5: Solve for x
    x = 310,678,135.20/18,940.20
  6. Step 6: Final answer
    x = 16,403.11

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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.