Home / 9,021.78-13,528.20-2,780.28

Finding the Fourth Proportional to 9,021.78, 13,528.20 and 2,780.28

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Solution

The fourth proportional to 9,021.78, 13,528.20 and 2,780.28 is: 4,169.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,021.78 : 13,528.20 = 2,780.28 : x
  2. Step 2: Convert to fraction form
    9,021.78/13,528.20 = 2,780.28/x
  3. Step 3: Cross multiply
    9,021.78x = 13,528.20 × 2,780.28
  4. Step 4: Simplify right side
    9,021.78x = 37,612,183.90
  5. Step 5: Solve for x
    x = 37,612,183.90/9,021.78
  6. Step 6: Final answer
    x = 4,169.04

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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.