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Finding the Fourth Proportional to 8,427.80, 12,641.96 and 2,880.92

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Solution

The fourth proportional to 8,427.80, 12,641.96 and 2,880.92 is: 4,321.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,427.80 : 12,641.96 = 2,880.92 : x
  2. Step 2: Convert to fraction form
    8,427.80/12,641.96 = 2,880.92/x
  3. Step 3: Cross multiply
    8,427.80x = 12,641.96 × 2,880.92
  4. Step 4: Simplify right side
    8,427.80x = 36,420,419.40
  5. Step 5: Solve for x
    x = 36,420,419.40/8,427.80
  6. Step 6: Final answer
    x = 4,321.46

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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.