Home / 6,622.78-9,139.08-3,790.21

Finding the Fourth Proportional to 6,622.78, 9,139.08 and 3,790.21

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Solution

The fourth proportional to 6,622.78, 9,139.08 and 3,790.21 is: 5,230.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,622.78 : 9,139.08 = 3,790.21 : x
  2. Step 2: Convert to fraction form
    6,622.78/9,139.08 = 3,790.21/x
  3. Step 3: Cross multiply
    6,622.78x = 9,139.08 × 3,790.21
  4. Step 4: Simplify right side
    6,622.78x = 34,639,032.41
  5. Step 5: Solve for x
    x = 34,639,032.41/6,622.78
  6. Step 6: Final answer
    x = 5,230.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.