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Finding the Fourth Proportional to 18,007.80, 26,987.40 and 12,067.80

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Solution

The fourth proportional to 18,007.80, 26,987.40 and 12,067.80 is: 18,085.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,007.80 : 26,987.40 = 12,067.80 : x
  2. Step 2: Convert to fraction form
    18,007.80/26,987.40 = 12,067.80/x
  3. Step 3: Cross multiply
    18,007.80x = 26,987.40 × 12,067.80
  4. Step 4: Simplify right side
    18,007.80x = 325,678,545.72
  5. Step 5: Solve for x
    x = 325,678,545.72/18,007.80
  6. Step 6: Final answer
    x = 18,085.42

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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.