Home / 6,622.90-9,139.32-3,638.67

Finding the Fourth Proportional to 6,622.90, 9,139.32 and 3,638.67

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Solution

The fourth proportional to 6,622.90, 9,139.32 and 3,638.67 is: 5,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,622.90 : 9,139.32 = 3,638.67 : x
  2. Step 2: Convert to fraction form
    6,622.90/9,139.32 = 3,638.67/x
  3. Step 3: Cross multiply
    6,622.90x = 9,139.32 × 3,638.67
  4. Step 4: Simplify right side
    6,622.90x = 33,254,969.50
  5. Step 5: Solve for x
    x = 33,254,969.50/6,622.90
  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.