Home / 6,622.80-9,139.49-3,638.55

Finding the Fourth Proportional to 6,622.80, 9,139.49 and 3,638.55

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Solution

The fourth proportional to 6,622.80, 9,139.49 and 3,638.55 is: 5,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,622.80 : 9,139.49 = 3,638.55 : x
  2. Step 2: Convert to fraction form
    6,622.80/9,139.49 = 3,638.55/x
  3. Step 3: Cross multiply
    6,622.80x = 9,139.49 × 3,638.55
  4. Step 4: Simplify right side
    6,622.80x = 33,254,491.34
  5. Step 5: Solve for x
    x = 33,254,491.34/6,622.80
  6. Step 6: Final answer
    x = 5,021.21

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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.