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Finding the Fourth Proportional to 5,810.87, 8,716.38 and 1,428.32

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Solution

The fourth proportional to 5,810.87, 8,716.38 and 1,428.32 is: 2,142.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,810.87 : 8,716.38 = 1,428.32 : x
  2. Step 2: Convert to fraction form
    5,810.87/8,716.38 = 1,428.32/x
  3. Step 3: Cross multiply
    5,810.87x = 8,716.38 × 1,428.32
  4. Step 4: Simplify right side
    5,810.87x = 12,449,779.88
  5. Step 5: Solve for x
    x = 12,449,779.88/5,810.87
  6. Step 6: Final answer
    x = 2,142.50

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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.