Home / 19,018.80-28,519.56-7,918.90

Finding the Fourth Proportional to 19,018.80, 28,519.56 and 7,918.90

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Solution

The fourth proportional to 19,018.80, 28,519.56 and 7,918.90 is: 11,874.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,018.80 : 28,519.56 = 7,918.90 : x
  2. Step 2: Convert to fraction form
    19,018.80/28,519.56 = 7,918.90/x
  3. Step 3: Cross multiply
    19,018.80x = 28,519.56 × 7,918.90
  4. Step 4: Simplify right side
    19,018.80x = 225,843,472.39
  5. Step 5: Solve for x
    x = 225,843,472.39/19,018.80
  6. Step 6: Final answer
    x = 11,874.75

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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.