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Finding the Fourth Proportional to 8,488.85, 12,720.24 and 3,555.78

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Solution

The fourth proportional to 8,488.85, 12,720.24 and 3,555.78 is: 5,328.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,488.85 : 12,720.24 = 3,555.78 : x
  2. Step 2: Convert to fraction form
    8,488.85/12,720.24 = 3,555.78/x
  3. Step 3: Cross multiply
    8,488.85x = 12,720.24 × 3,555.78
  4. Step 4: Simplify right side
    8,488.85x = 45,230,374.99
  5. Step 5: Solve for x
    x = 45,230,374.99/8,488.85
  6. Step 6: Final answer
    x = 5,328.21

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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.