Home / 18,926.80-28,395.68-7,831.44

Finding the Fourth Proportional to 18,926.80, 28,395.68 and 7,831.44

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Solution

The fourth proportional to 18,926.80, 28,395.68 and 7,831.44 is: 11,749.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,926.80 : 28,395.68 = 7,831.44 : x
  2. Step 2: Convert to fraction form
    18,926.80/28,395.68 = 7,831.44/x
  3. Step 3: Cross multiply
    18,926.80x = 28,395.68 × 7,831.44
  4. Step 4: Simplify right side
    18,926.80x = 222,379,064.18
  5. Step 5: Solve for x
    x = 222,379,064.18/18,926.80
  6. Step 6: Final answer
    x = 11,749.43

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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.