Home / 18,920.42-28,385.07-5,772.79

Finding the Fourth Proportional to 18,920.42, 28,385.07 and 5,772.79

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Solution

The fourth proportional to 18,920.42, 28,385.07 and 5,772.79 is: 8,660.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.42 : 28,385.07 = 5,772.79 : x
  2. Step 2: Convert to fraction form
    18,920.42/28,385.07 = 5,772.79/x
  3. Step 3: Cross multiply
    18,920.42x = 28,385.07 × 5,772.79
  4. Step 4: Simplify right side
    18,920.42x = 163,861,048.25
  5. Step 5: Solve for x
    x = 163,861,048.25/18,920.42
  6. Step 6: Final answer
    x = 8,660.54

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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.