Home / 18,923.58-28,390.83-7,828.20

Finding the Fourth Proportional to 18,923.58, 28,390.83 and 7,828.20

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Solution

The fourth proportional to 18,923.58, 28,390.83 and 7,828.20 is: 11,744.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.58 : 28,390.83 = 7,828.20 : x
  2. Step 2: Convert to fraction form
    18,923.58/28,390.83 = 7,828.20/x
  3. Step 3: Cross multiply
    18,923.58x = 28,390.83 × 7,828.20
  4. Step 4: Simplify right side
    18,923.58x = 222,249,095.41
  5. Step 5: Solve for x
    x = 222,249,095.41/18,923.58
  6. Step 6: Final answer
    x = 11,744.56

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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.