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Finding the Fourth Proportional to 8,579.42, 12,870.58 and 2,956.87

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Solution

The fourth proportional to 8,579.42, 12,870.58 and 2,956.87 is: 4,435.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.42 : 12,870.58 = 2,956.87 : x
  2. Step 2: Convert to fraction form
    8,579.42/12,870.58 = 2,956.87/x
  3. Step 3: Cross multiply
    8,579.42x = 12,870.58 × 2,956.87
  4. Step 4: Simplify right side
    8,579.42x = 38,056,631.88
  5. Step 5: Solve for x
    x = 38,056,631.88/8,579.42
  6. Step 6: Final answer
    x = 4,435.80

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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.