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Finding the Fourth Proportional to 8,605.40, 12,907.82 and 2,449.40

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Solution

The fourth proportional to 8,605.40, 12,907.82 and 2,449.40 is: 3,674.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.40 : 12,907.82 = 2,449.40 : x
  2. Step 2: Convert to fraction form
    8,605.40/12,907.82 = 2,449.40/x
  3. Step 3: Cross multiply
    8,605.40x = 12,907.82 × 2,449.40
  4. Step 4: Simplify right side
    8,605.40x = 31,616,355.89
  5. Step 5: Solve for x
    x = 31,616,355.89/8,605.40
  6. Step 6: Final answer
    x = 3,674.02

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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.