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Finding the Fourth Proportional to 6,620.99, 9,916.91 and 4,419.41

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Solution

The fourth proportional to 6,620.99, 9,916.91 and 4,419.41 is: 6,619.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.99 : 9,916.91 = 4,419.41 : x
  2. Step 2: Convert to fraction form
    6,620.99/9,916.91 = 4,419.41/x
  3. Step 3: Cross multiply
    6,620.99x = 9,916.91 × 4,419.41
  4. Step 4: Simplify right side
    6,620.99x = 43,826,869.13
  5. Step 5: Solve for x
    x = 43,826,869.13/6,620.99
  6. Step 6: Final answer
    x = 6,619.38

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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.