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Finding the Fourth Proportional to 7,871, 10,861.04 and 4,513.64

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Solution

The fourth proportional to 7,871, 10,861.04 and 4,513.64 is: 6,228.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871 : 10,861.04 = 4,513.64 : x
  2. Step 2: Convert to fraction form
    7,871/10,861.04 = 4,513.64/x
  3. Step 3: Cross multiply
    7,871x = 10,861.04 × 4,513.64
  4. Step 4: Simplify right side
    7,871x = 49,022,802.02
  5. Step 5: Solve for x
    x = 49,022,802.02/7,871
  6. Step 6: Final answer
    x = 6,228.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.