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Finding the Fourth Proportional to 6,622.99, 9,919.90 and 4,421.41

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Solution

The fourth proportional to 6,622.99, 9,919.90 and 4,421.41 is: 6,622.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,622.99 : 9,919.90 = 4,421.41 : x
  2. Step 2: Convert to fraction form
    6,622.99/9,919.90 = 4,421.41/x
  3. Step 3: Cross multiply
    6,622.99x = 9,919.90 × 4,421.41
  4. Step 4: Simplify right side
    6,622.99x = 43,859,945.06
  5. Step 5: Solve for x
    x = 43,859,945.06/6,622.99
  6. Step 6: Final answer
    x = 6,622.38

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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.