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Finding the Fourth Proportional to 8,643.63, 12,965.46 and 5,863.42

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Solution

The fourth proportional to 8,643.63, 12,965.46 and 5,863.42 is: 8,795.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.63 : 12,965.46 = 5,863.42 : x
  2. Step 2: Convert to fraction form
    8,643.63/12,965.46 = 5,863.42/x
  3. Step 3: Cross multiply
    8,643.63x = 12,965.46 × 5,863.42
  4. Step 4: Simplify right side
    8,643.63x = 76,021,937.47
  5. Step 5: Solve for x
    x = 76,021,937.47/8,643.63
  6. Step 6: Final answer
    x = 8,795.14

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Double scale
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Similar ratio
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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.