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Finding the Fourth Proportional to 8,918.65, 13,374.19 and 4,757.77

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Solution

The fourth proportional to 8,918.65, 13,374.19 and 4,757.77 is: 7,134.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.65 : 13,374.19 = 4,757.77 : x
  2. Step 2: Convert to fraction form
    8,918.65/13,374.19 = 4,757.77/x
  3. Step 3: Cross multiply
    8,918.65x = 13,374.19 × 4,757.77
  4. Step 4: Simplify right side
    8,918.65x = 63,631,319.96
  5. Step 5: Solve for x
    x = 63,631,319.96/8,918.65
  6. Step 6: Final answer
    x = 7,134.64

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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.