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Finding the Fourth Proportional to 8,958.37, 12,361.17 and 4,979.47

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Solution

The fourth proportional to 8,958.37, 12,361.17 and 4,979.47 is: 6,870.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,958.37 : 12,361.17 = 4,979.47 : x
  2. Step 2: Convert to fraction form
    8,958.37/12,361.17 = 4,979.47/x
  3. Step 3: Cross multiply
    8,958.37x = 12,361.17 × 4,979.47
  4. Step 4: Simplify right side
    8,958.37x = 61,552,075.18
  5. Step 5: Solve for x
    x = 61,552,075.18/8,958.37
  6. Step 6: Final answer
    x = 6,870.90

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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.