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Finding the Fourth Proportional to 8,670.77, 12,997.78 and 3,994

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Solution

The fourth proportional to 8,670.77, 12,997.78 and 3,994 is: 5,987.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,670.77 : 12,997.78 = 3,994 : x
  2. Step 2: Convert to fraction form
    8,670.77/12,997.78 = 3,994/x
  3. Step 3: Cross multiply
    8,670.77x = 12,997.78 × 3,994
  4. Step 4: Simplify right side
    8,670.77x = 51,913,133.32
  5. Step 5: Solve for x
    x = 51,913,133.32/8,670.77
  6. Step 6: Final answer
    x = 5,987.14

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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.