Home / 18,923.68-28,388.88-6,445.12

Finding the Fourth Proportional to 18,923.68, 28,388.88 and 6,445.12

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Solution

The fourth proportional to 18,923.68, 28,388.88 and 6,445.12 is: 9,668.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.68 : 28,388.88 = 6,445.12 : x
  2. Step 2: Convert to fraction form
    18,923.68/28,388.88 = 6,445.12/x
  3. Step 3: Cross multiply
    18,923.68x = 28,388.88 × 6,445.12
  4. Step 4: Simplify right side
    18,923.68x = 182,969,738.27
  5. Step 5: Solve for x
    x = 182,969,738.27/18,923.68
  6. Step 6: Final answer
    x = 9,668.82

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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.