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Finding the Fourth Proportional to 8,675.90, 13,005.16 and 3,999.28

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Solution

The fourth proportional to 8,675.90, 13,005.16 and 3,999.28 is: 5,994.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,675.90 : 13,005.16 = 3,999.28 : x
  2. Step 2: Convert to fraction form
    8,675.90/13,005.16 = 3,999.28/x
  3. Step 3: Cross multiply
    8,675.90x = 13,005.16 × 3,999.28
  4. Step 4: Simplify right side
    8,675.90x = 52,011,276.28
  5. Step 5: Solve for x
    x = 52,011,276.28/8,675.90
  6. Step 6: Final answer
    x = 5,994.91

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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.