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Finding the Fourth Proportional to 8,581.90, 12,880.97 and 4,424.78

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Solution

The fourth proportional to 8,581.90, 12,880.97 and 4,424.78 is: 6,641.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581.90 : 12,880.97 = 4,424.78 : x
  2. Step 2: Convert to fraction form
    8,581.90/12,880.97 = 4,424.78/x
  3. Step 3: Cross multiply
    8,581.90x = 12,880.97 × 4,424.78
  4. Step 4: Simplify right side
    8,581.90x = 56,995,437.54
  5. Step 5: Solve for x
    x = 56,995,437.54/8,581.90
  6. Step 6: Final answer
    x = 6,641.35

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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.