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Finding the Fourth Proportional to 8,457.75, 12,690.27 and 4,995

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Solution

The fourth proportional to 8,457.75, 12,690.27 and 4,995 is: 7,494.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,457.75 : 12,690.27 = 4,995 : x
  2. Step 2: Convert to fraction form
    8,457.75/12,690.27 = 4,995/x
  3. Step 3: Cross multiply
    8,457.75x = 12,690.27 × 4,995
  4. Step 4: Simplify right side
    8,457.75x = 63,387,898.65
  5. Step 5: Solve for x
    x = 63,387,898.65/8,457.75
  6. Step 6: Final answer
    x = 7,494.65

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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.