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Finding the Fourth Proportional to 8,613.29, 12,919.79 and 4,907.63

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Solution

The fourth proportional to 8,613.29, 12,919.79 and 4,907.63 is: 7,361.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.29 : 12,919.79 = 4,907.63 : x
  2. Step 2: Convert to fraction form
    8,613.29/12,919.79 = 4,907.63/x
  3. Step 3: Cross multiply
    8,613.29x = 12,919.79 × 4,907.63
  4. Step 4: Simplify right side
    8,613.29x = 63,405,496.67
  5. Step 5: Solve for x
    x = 63,405,496.67/8,613.29
  6. Step 6: Final answer
    x = 7,361.36

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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.