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Finding the Fourth Proportional to 8,551.18, 12,809.70 and 5,620.60

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Solution

The fourth proportional to 8,551.18, 12,809.70 and 5,620.60 is: 8,419.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,551.18 : 12,809.70 = 5,620.60 : x
  2. Step 2: Convert to fraction form
    8,551.18/12,809.70 = 5,620.60/x
  3. Step 3: Cross multiply
    8,551.18x = 12,809.70 × 5,620.60
  4. Step 4: Simplify right side
    8,551.18x = 71,998,199.82
  5. Step 5: Solve for x
    x = 71,998,199.82/8,551.18
  6. Step 6: Final answer
    x = 8,419.68

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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.