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Finding the Fourth Proportional to 5,857.65, 8,787.65 and 2,159.90

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Solution

The fourth proportional to 5,857.65, 8,787.65 and 2,159.90 is: 3,240.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,857.65 : 8,787.65 = 2,159.90 : x
  2. Step 2: Convert to fraction form
    5,857.65/8,787.65 = 2,159.90/x
  3. Step 3: Cross multiply
    5,857.65x = 8,787.65 × 2,159.90
  4. Step 4: Simplify right side
    5,857.65x = 18,980,390.50
  5. Step 5: Solve for x
    x = 18,980,390.50/5,857.65
  6. Step 6: Final answer
    x = 3,240.27

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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.