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Finding the Fourth Proportional to 5,455.50, 8,220.39 and 4,858.74

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Solution

The fourth proportional to 5,455.50, 8,220.39 and 4,858.74 is: 7,321.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,455.50 : 8,220.39 = 4,858.74 : x
  2. Step 2: Convert to fraction form
    5,455.50/8,220.39 = 4,858.74/x
  3. Step 3: Cross multiply
    5,455.50x = 8,220.39 × 4,858.74
  4. Step 4: Simplify right side
    5,455.50x = 39,940,737.71
  5. Step 5: Solve for x
    x = 39,940,737.71/5,455.50
  6. Step 6: Final answer
    x = 7,321.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.